Removed our io.h as it conflicts with different platforms as they already include <io.h> lib. So O_BINARY has been moved to packfile.h
Also updated VC8 compiling parameters for better debugging and faster runtimes. The same will be applied to VC7 once I get home.
Authored by: SumolX 2008-01-11
Parent: [r1320]
Child: [r1322]
