Update API docs (#1607)

docs/Lua API.rst

@@ -2093,6 +2093,11 @@ unless otherwise noted.
 
   Creates a new directory. Returns ``false`` if unsuccessful, including if ``path`` already exists.
 
+* ``dfhack.filesystem.mkdir_recursive(path)``
+
+  Creates a new directory, including any intermediate directories that don't exist yet.
+  Returns ``true`` if the folder was created or already existed, or ``false`` if unsuccessful.
+
 * ``dfhack.filesystem.rmdir(path)``
 
   Removes a directory. Only works if the directory is already empty.

docs/changelog.txt

@@ -50,6 +50,9 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 - `blueprint`: now automatically creates folder trees when organizing blueprints into subfolders (e.g. ``blueprint 30 30 1 rooms/dining dig`` will create the file ``blueprints/rooms/dining-dig.csv``); previously it would fail if the ``blueprints/rooms/`` directory didn't already exist
 - `confirm`: added a confirmation dialog for convicting dwarves of crimes
 
+## API
+- Added ``Filesystem::mkdir_recursive``
+
 ## Lua
 - Added a ``ref_target`` field to primitive field references, corresponding to the ``ref-target`` XML attribute