General:

*         Upgraded Steamworks SDK to v1.29
*         Fixed mod compatibility problem with Multiplayer Base that was introduced in September.
*         In Hammer, while using the Vertex Tool, pressing CTRL+B will snap selected vertices to the grid.

Virtual Reality:
*         Mods that support virtual reality now need to have a line in gameinfo.txt that says “supportsvr 1”. This indicates to gameui and engine that certain UI should be enabled.
*         VR-enabled mods will now start up in VR mode when launched from Steam’s VR mode.

Windows:
*         Upgraded to Visual Studio 2013. If you need to build projects for VS 2010, add /2010 to your VPC command line.

OSX:
*         Upgraded to XCode 5.

mp/src/devtools/makefile_base_posix.mak

@@ -42,9 +42,9 @@ CFLAGS = $(ARCH_FLAGS) $(CPPFLAGS) $(WARN_FLAGS) -fvisibility=$(SymbolVisibility
 # In -std=gnu++0x mode we get lots of errors about "error: narrowing conversion". -fpermissive
 # turns these into warnings in gcc, and -Wno-c++11-narrowing suppresses them entirely in clang 3.1+.
 ifeq ($(CXX),clang++)
-	CXXFLAGS = $(CFLAGS) -Wno-c++11-narrowing
+	CXXFLAGS = $(CFLAGS) -std=gnu++0x -Wno-c++11-narrowing -Wno-dangling-else
 else
-	CXXFLAGS = $(CFLAGS) -fpermissive
+	CXXFLAGS = $(CFLAGS) -std=gnu++0x -fpermissive
 endif
 DEFINES += -DVPROF_LEVEL=1 -DGNUC -DNO_HOOK_MALLOC -DNO_MALLOC_OVERRIDE
 LDFLAGS = $(CFLAGS) $(GCC_ExtraLinkerFlags) $(OptimizerLevel)