Re-add the scripts submodule, with a different internal name

This will break existing clones when using git versions before 1.8.1, which do
not support the --name option of "git submodule add", unless steps are taken to
remove the old scripts submodules in .git/modules (see Compile.rst).

.gitmodules

@@ -10,3 +10,6 @@
 [submodule "depends/clsocket"]
 	path = depends/clsocket
 	url = git://github.com/DFHack/clsocket.git
+[submodule "scripts2"]
+	path = scripts
+	url = git://github.com/dfhack/scripts.git

scripts

@@ -0,0 +1 @@
+Subproject commit b67885c0c07931a402a3b642a4e2468f14782058