General:
* Fixed a variety of server browser issues with mods based on this SDK
* Fixed many warnings on various platforms
* Added source code for fgdlib and raytrace
* Updated many source files with the latest shared source from TF2.

OSX:
* Added support for Xcode 4.6
* Switched OSX builds to use Xcode instead of makefiles
* Moved libs from src/lib/osx32 to src/lib/public/osx32 or src/lib/common/osx32 to match windows better.

Linux:
* Moved libs from src/lib/linux32 to src/lib/public/linux32 or src/lib/common/linux32 to match windows better.
Merge branch 'valvesoftware/master'

Conflicts:
	mp/src/game/server/hl2/npc_barnacle.cpp
	sp/src/game/server/hl2/npc_barnacle.cpp
Merge branch 'origin/merge-sdk-upstream'