diff --git a/.gitignore b/.gitignore
index 4d3986c67..1c47520cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -56,3 +56,4 @@ tags
 #VS is annoying about this one.
 /build/win64/DF_PATH.txt
 /build/win32/DF_PATH.txt
+/.vs
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6d6118c65..b2fb036fa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -44,8 +44,8 @@ if(UNIX)
 endif()
 
 if(WIN32)
-  if((NOT MSVC) OR (NOT MSVC_VERSION STREQUAL 1900))
-    message(SEND_ERROR "MSVC 2015 is required")
+  if((NOT MSVC) OR (MSVC_VERSION LESS 1900) OR (MSVC_VERSION GREATER 1919))
+    message(SEND_ERROR "MSVC 2015 or 2017 is required")
   endif()
 endif()
 
diff --git a/CMakeSettings.json b/CMakeSettings.json
new file mode 100644
index 000000000..eef8fdb2e
--- /dev/null
+++ b/CMakeSettings.json
@@ -0,0 +1,305 @@
+{
+  // See https://go.microsoft.com//fwlink/?linkid=834763 for more information about this file.
+  "configurations": [
+    {
+      "name": "MSVC 32 Debug",
+      "generator": "Visual Studio 14 2015",
+      "configurationType": "RelWithDebInfo",
+      "intelliSenseMode": "windows-msvc-x86",
+      "variables": [
+        {
+          "name": "DFHACK_BUILD_ARCH",
+          "value": "32"
+        },
+        {
+          "name": "BUILD_STONESENSE",
+          "value": "1"
+        },
+        {
+          "name": "REMOVE_SYMBOLS_FROM_DF_STUBS",
+          "value": "0"
+        }
+      ],
+      "installRoot": "${thisFileDir}/build/win32/DF"
+    },
+    {
+      "name": "MSVC 32 Release",
+      "generator": "Visual Studio 14 2015",
+      "configurationType": "Release",
+      "intelliSenseMode": "windows-msvc-x86",
+      "variables": [
+        {
+          "name": "DFHACK_BUILD_ARCH",
+          "value": "32"
+        },
+        {
+          "name": "BUILD_STONESENSE",
+          "value": "1"
+        }
+      ],
+      "installRoot": "${thisFileDir}/build/win32/DF"
+    },
+    {
+      "name": "MSVC 64 Debug",
+      "generator": "Visual Studio 14 2015 Win64",
+      "configurationType": "RelWithDebInfo",
+      "intelliSenseMode": "windows-msvc-x64",
+      "variables": [
+        {
+          "name": "DFHACK_BUILD_ARCH",
+          "value": "64"
+        },
+        {
+          "name": "BUILD_STONESENSE",
+          "value": "1"
+        },
+        {
+          "name": "REMOVE_SYMBOLS_FROM_DF_STUBS",
+          "value": "0"
+        }
+      ],
+      "installRoot": "${thisFileDir}/build/win64/DF"
+    },
+    {
+      "name": "MSVC 64 Release",
+      "generator": "Visual Studio 14 2015 Win64",
+      "configurationType": "Release",
+      "intelliSenseMode": "windows-msvc-x64",
+      "variables": [
+        {
+          "name": "DFHACK_BUILD_ARCH",
+          "value": "64"
+        },
+        {
+          "name": "BUILD_STONESENSE",
+          "value": "1"
+        }
+      ],
+      "installRoot": "${thisFileDir}/build/win64/DF"
+    },
+    {
+      "name": "GCC 32 Debug",
+      "remoteMachineName": "${defaultRemoteMachineName}",
+      "remoteCMakeListsRoot": "/tmp/dfhack-${workspaceHash}/src",
+      "remoteBuildRoot": "/tmp/dfhack-${workspaceHash}/debug-32",
+      "rsyncCommandArgs": "--exclude=build --include=.git",
+      "remoteCopySources": true,
+      "cmakeExecutable": "$(which cmake)/..",
+      "generator": "Unix Makefiles",
+      "configurationType": "RelWithDebInfo",
+      "intelliSenseMode": "linux-gcc-x86",
+      "variables": [
+        {
+          "name": "DFHACK_BUILD_ARCH",
+          "value": "32"
+        },
+        {
+          "name": "BUILD_STONESENSE",
+          "value": "1"
+        },
+        {
+          "name": "REMOVE_SYMBOLS_FROM_DF_STUBS",
+          "value": "0"
+        }
+      ]
+    },
+    {
+      "name": "GCC 32 Release",
+      "remoteMachineName": "${defaultRemoteMachineName}",
+      "remoteCMakeListsRoot": "/tmp/dfhack-${workspaceHash}/src",
+      "remoteBuildRoot": "/tmp/dfhack-${workspaceHash}/release-32",
+      "rsyncCommandArgs": "--exclude=build --include=.git",
+      "remoteCopySources": true,
+      "cmakeExecutable": "$(which cmake)/..",
+      "generator": "Unix Makefiles",
+      "configurationType": "Release",
+      "intelliSenseMode": "linux-gcc-x86",
+      "variables": [
+        {
+          "name": "DFHACK_BUILD_ARCH",
+          "value": "32"
+        },
+        {
+          "name": "BUILD_STONESENSE",
+          "value": "1"
+        }
+      ]
+    },
+    {
+      "name": "GCC 64 Debug",
+      "remoteMachineName": "${defaultRemoteMachineName}",
+      "remoteCMakeListsRoot": "/tmp/dfhack-${workspaceHash}/src",
+      "remoteBuildRoot": "/tmp/dfhack-${workspaceHash}/debug-64",
+      "rsyncCommandArgs": "--exclude=build --include=.git",
+      "remoteCopySources": true,
+      "cmakeExecutable": "$(which cmake)/..",
+      "generator": "Unix Makefiles",
+      "configurationType": "RelWithDebInfo",
+      "intelliSenseMode": "linux-gcc-x64",
+      "variables": [
+        {
+          "name": "DFHACK_BUILD_ARCH",
+          "value": "64"
+        },
+        {
+          "name": "BUILD_STONESENSE",
+          "value": "1"
+        },
+        {
+          "name": "REMOVE_SYMBOLS_FROM_DF_STUBS",
+          "value": "0"
+        }
+      ]
+    },
+    {
+      "name": "GCC 64 Release",
+      "remoteMachineName": "${defaultRemoteMachineName}",
+      "remoteCMakeListsRoot": "/tmp/dfhack-${workspaceHash}/src",
+      "remoteBuildRoot": "/tmp/dfhack-${workspaceHash}/release-64",
+      "rsyncCommandArgs": "--exclude=build --include=.git",
+      "remoteCopySources": true,
+      "cmakeExecutable": "$(which cmake)/..",
+      "generator": "Unix Makefiles",
+      "configurationType": "Release",
+      "intelliSenseMode": "linux-gcc-x64",
+      "variables": [
+        {
+          "name": "DFHACK_BUILD_ARCH",
+          "value": "64"
+        },
+        {
+          "name": "BUILD_STONESENSE",
+          "value": "1"
+        }
+      ]
+    },
+    {
+      "name": "GCC 4.8 32 Debug",
+      "remoteMachineName": "${defaultRemoteMachineName}",
+      "remoteCMakeListsRoot": "/tmp/dfhack-${workspaceHash}/src",
+      "remoteBuildRoot": "/tmp/dfhack-${workspaceHash}/debug-32-48",
+      "rsyncCommandArgs": "--exclude=build --include=.git",
+      "remoteCopySources": true,
+      "cmakeExecutable": "$(which cmake)/..",
+      "generator": "Unix Makefiles",
+      "configurationType": "RelWithDebInfo",
+      "intelliSenseMode": "linux-gcc-x86",
+      "variables": [
+        {
+          "name": "CMAKE_C_COMPILER",
+          "value": "gcc-4.8"
+        },
+        {
+          "name": "CMAKE_CXX_COMPILER",
+          "value": "g++-4.8"
+        },
+        {
+          "name": "DFHACK_BUILD_ARCH",
+          "value": "32"
+        },
+        {
+          "name": "BUILD_STONESENSE",
+          "value": "1"
+        },
+        {
+          "name": "REMOVE_SYMBOLS_FROM_DF_STUBS",
+          "value": "0"
+        }
+      ]
+    },
+    {
+      "name": "GCC 4.8 32 Release",
+      "remoteMachineName": "${defaultRemoteMachineName}",
+      "remoteCMakeListsRoot": "/tmp/dfhack-${workspaceHash}/src",
+      "remoteBuildRoot": "/tmp/dfhack-${workspaceHash}/release-32-48",
+      "rsyncCommandArgs": "--exclude=build --include=.git",
+      "remoteCopySources": true,
+      "cmakeExecutable": "$(which cmake)/..",
+      "generator": "Unix Makefiles",
+      "configurationType": "Release",
+      "intelliSenseMode": "linux-gcc-x86",
+      "variables": [
+        {
+          "name": "CMAKE_C_COMPILER",
+          "value": "gcc-4.8"
+        },
+        {
+          "name": "CMAKE_CXX_COMPILER",
+          "value": "g++-4.8"
+        },
+        {
+          "name": "DFHACK_BUILD_ARCH",
+          "value": "32"
+        },
+        {
+          "name": "BUILD_STONESENSE",
+          "value": "1"
+        }
+      ]
+    },
+    {
+      "name": "GCC 4.8 64 Debug",
+      "remoteMachineName": "${defaultRemoteMachineName}",
+      "remoteCMakeListsRoot": "/tmp/dfhack-${workspaceHash}/src",
+      "remoteBuildRoot": "/tmp/dfhack-${workspaceHash}/debug-64-48",
+      "rsyncCommandArgs": "--exclude=build --include=.git",
+      "remoteCopySources": true,
+      "cmakeExecutable": "$(which cmake)/..",
+      "generator": "Unix Makefiles",
+      "configurationType": "RelWithDebInfo",
+      "intelliSenseMode": "linux-gcc-x64",
+      "variables": [
+        {
+          "name": "CMAKE_C_COMPILER",
+          "value": "gcc-4.8"
+        },
+        {
+          "name": "CMAKE_CXX_COMPILER",
+          "value": "g++-4.8"
+        },
+        {
+          "name": "DFHACK_BUILD_ARCH",
+          "value": "64"
+        },
+        {
+          "name": "BUILD_STONESENSE",
+          "value": "1"
+        },
+        {
+          "name": "REMOVE_SYMBOLS_FROM_DF_STUBS",
+          "value": "0"
+        }
+      ]
+    },
+    {
+      "name": "GCC 4.8 64 Release",
+      "remoteMachineName": "${defaultRemoteMachineName}",
+      "remoteCMakeListsRoot": "/tmp/dfhack-${workspaceHash}/src",
+      "remoteBuildRoot": "/tmp/dfhack-${workspaceHash}/release-64-48",
+      "rsyncCommandArgs": "--exclude=build --include=.git",
+      "remoteCopySources": true,
+      "cmakeExecutable": "$(which cmake)/..",
+      "generator": "Unix Makefiles",
+      "configurationType": "Release",
+      "intelliSenseMode": "linux-gcc-x64",
+      "variables": [
+        {
+          "name": "CMAKE_C_COMPILER",
+          "value": "gcc-4.8"
+        },
+        {
+          "name": "CMAKE_CXX_COMPILER",
+          "value": "g++-4.8"
+        },
+        {
+          "name": "DFHACK_BUILD_ARCH",
+          "value": "64"
+        },
+        {
+          "name": "BUILD_STONESENSE",
+          "value": "1"
+        }
+      ]
+    }
+  ]
+}
diff --git a/docs/Compile.rst b/docs/Compile.rst
index c392cdc49..36d5550d4 100644
--- a/docs/Compile.rst
+++ b/docs/Compile.rst
@@ -33,13 +33,16 @@ To get the latest development code (develop branch), clone as above and then::
 
 Generally, you should only need to clone DFHack once.
 
-**Important note regarding submodule update and changing branches**:
-
-You must run ``git submodule update`` every time you change branches,
-such as when switching between the master and develop branches or vice versa.
-If a submodule only exists on the newer branch, you also need to run
-``git submodule update --init``. Failure to do this may result in strange
-build errors or "not a known DF version" errors.
+**Important note regarding submodule update after pulling or changing branches**:
+
+You must run ``git submodule update`` every time you change branches, such as
+when switching between the master and develop branches or vice versa. You also
+must run it after pulling any changes to submodules from the DFHack repo. If a
+submodule only exists on the newer branch, or if a commit you just pulled
+contains a new submodule, you need to run ``git submodule update --init``.
+Failure to do this may result in a variety of errors, including ``fatal: <path>
+does not exist`` when using Git, errors when building DFHack, and ``not a known
+DF version`` when starting DF.
 
 **More notes**:
 
diff --git a/docs/changelog.txt b/docs/changelog.txt
index a048b1df1..d3abf3414 100644
--- a/docs/changelog.txt
+++ b/docs/changelog.txt
@@ -43,6 +43,7 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 - Fixed special characters in `command-prompt` and other non-console in-game outputs on Linux/macOS (in tools using ``df2console``)
 - `die`: fixed windows crash in exit handling
 - `dwarfmonitor`, `manipulator`: fixed stress cutoffs
+- `ruby`: fixed calling conventions for vmethods that return strings (currently ``enabler.GetKeyDisplay()``)
 - `startdwarf`: fixed on 64-bit Linux
 
 ## Misc Improvements
@@ -51,6 +52,10 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
     - Switched to standard scrolling keys, improved spacing slightly
     - Introduced scrolling of Finder search criteria, removing requirement for 46 lines to work properly (Help/Info still formatted for 46 lines).
     - Added Freezing search criterion, allowing searches for NA/Frozen/At_Least_Partial/Partial/At_Most_Partial/Never Freezing embarks.
+- `rejuvenate`:
+    - Added ``-all`` argument to apply to all citizens
+    - Added ``-force`` to include units under 20 years old
+    - Clarified documentation
 
 ## API
 - Added to ``Units`` module:
diff --git a/plugins/ruby/codegen.pl b/plugins/ruby/codegen.pl
index ad5f4b239..2a12a1bea 100755
--- a/plugins/ruby/codegen.pl
+++ b/plugins/ruby/codegen.pl
@@ -462,8 +462,13 @@ sub render_class_vmethods {
             push @lines_rb, "def $name(" . join(', ', @argnames) . ')';
             indent_rb {
                 my $args = join('', map { ", $_" } @argargs);
-                my $call = "DFHack.vmethod_call(self, $voff$args)";
                 my $ret = $meth->findnodes('child::ret-type')->[0];
+                my $call;
+                if (!$ret or $ret->getAttribute('ld:meta') ne 'primitive') {
+                    $call = "DFHack.vmethod_call(self, $voff$args)";
+                } else {
+                    $call = "DFHack.vmethod_call_mem_return(self, $voff, rv$args)";
+                }
                 render_class_vmethod_ret($call, $ret);
             };
             push @lines_rb, 'end';
@@ -534,6 +539,18 @@ sub render_class_vmethod_ret {
         };
         push @lines_rb, "end._at(ptr) if ptr != 0";
     }
+    elsif ($retmeta eq 'primitive')
+    {
+        my $subtype = $ret->getAttribute('ld:subtype');
+        if ($subtype eq 'stl-string') {
+            push @lines_rb, "rv = DFHack::StlString.cpp_new";
+            push @lines_rb, $call;
+            push @lines_rb, "rv";
+        } else {
+            print "Unknown return subtype for $call\n";
+            push @lines_rb, "nil";
+        }
+    }
     else
     {
         print "vmethod unkret $call\n";
diff --git a/plugins/ruby/ruby-autogen-defs.rb b/plugins/ruby/ruby-autogen-defs.rb
index ca5d82393..10727894d 100644
--- a/plugins/ruby/ruby-autogen-defs.rb
+++ b/plugins/ruby/ruby-autogen-defs.rb
@@ -994,6 +994,14 @@ module DFHack
                         vmethod_arg(a3), vmethod_arg(a4), vmethod_arg(a5))
     end
 
+    def self.vmethod_call_mem_return(obj, voff, r0=0, a0=0, a1=0, a2=0, a3=0, a4=0)
+        this = obj._memaddr
+        vt = df.get_vtable_ptr(this)
+        fptr = df.memory_read_ptr(vt + voff)
+        vmethod_do_call(vmethod_arg(r0), fptr, this, vmethod_arg(a0), vmethod_arg(a1), vmethod_arg(a2),
+                        vmethod_arg(a3), vmethod_arg(a4))
+    end
+
     def self.vmethod_arg(arg)
         case arg
         when nil, false; 0
diff --git a/scripts b/scripts
index 6849148e8..801499ab6 160000
--- a/scripts
+++ b/scripts
@@ -1 +1 @@
-Subproject commit 6849148e8694f5da415cd6920dd9094c352110de
+Subproject commit 801499ab67e28bc017e72397ce3c9fddad1829a2