Define POSIX when compiling for any build on linux/mac.
Fix tier0/vstdlib lookup in core for recent L4D2 changes.
Updated L4D2 IServer gamedata for Windows.
Update TF2 Gamedata
Update TF2 ForceRespawn offset
Update GroundEndChanged for CS:S and CS:GO
Update TF2 Reload Offset
Fix SDKHooks gamedata for Half-Life 2 and DOD:S
Updated for latest hl2sdk-dota changes.
Don't load nextmap on Dota 2.
Updated for latest hl2sdk-dota changes.