added OS_WINRT and OS_WP8
added CC_PLATFORM_WINRT and CC_PLATFORM_WP8
fix for already defined RELATIVE in WP8 headers
added OS_WINRT and OS_WP8
added CC_PLATFORM_WINRT and CC_PLATFORM_WP8
fix for already defined ABSOLUTE in WP8 headers
fix for variable length args on WP8
added WINRT and WP8 platform targets