* Added support for building shaders in your mod
* Added nav mesh support
* fixed many warnings and misc bugs
* Fixed the create*projects scripts in mp
* Added a bunch of stuff to .gitignore
Added missing OSX and Linux shaderlibs
Added all the HL2 and HL2MP strings to their string tables to match the way the game loads string tables.
Added all the ep2 strings to their string tables to match the way the game loads string tables.
Added .vcds from all the singleplayer games in the SDK
Added skill cfg files so that refilling ammo will work.
Added .vcd files from lost coast
Revised the contribution guidelines to encourage more interaction within the community.
Merge pull request #1 from ValveSoftware/master

Merging