insert uniform layout statement after every #extension lines. Use extension instead of version 140 in those renderers not supporting that version
+added document about special keywords in shader code
-adding core GL profile to linux. Check GL capabilities after context creation
minor changes
minor changes
- fixed core profile GL creation on Win32
move opengl context creation to CreateContext()
typo
- fixed black screen on IOS due to wrong default framebuffer (!= 0)