The button mask is created by shifting a bit according to the
MouseCode, which is just a renamed ButtonCode_t.
Mouse buttons start at 107, which is way out of range for our ints.
To fix this, introduce MouseButtonBit(), which checks if a button code
corresponds to a mouse button at all and returns a usable bitmask
for the corresponding mouse button code.
This is then used for the button mask.
* 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.
* 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.
