Abstracted many fs funcs with helper class.
Removed much duplicated code.
Fixed ReadFile assuming FS errors for ValveFS.
Added ValveFS support for ReadFileString, WriteFile, WriteFileString, DeleteFile.
Added missing param in doc for OpenFile.
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
--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%401971