Fixed up IGameHelpers.h such that it no longer requires HL2SDK headers if a function doesn't need them
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extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%402144
Various minor things done to project files
Updated sample extension project file and updated makefile to the new unified version (more changes likely on the way)
Updated regex project file and makefile
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extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%401971