Update extconf for mingw32
Update rakefile to handle whole build process
Update docstring for Window class
Use m4 in video.c for yard documentation
Refine Rakefile
Refine rakefile
Update memory test for updating APIs
Update the docstring of class Window
Add type information to keycode and scancode constants
Update docstring
Do not use @macro in C sources
Update docstrings
Add Display::Mode#{w,h,format,refresh_rate}.
Ignore video.c since this file is created from video.c.m4
Add methods for OpenGL support
Update opengl interface
Update OpenGL interface
Use Gem::PackageTask for building gems
Ignore gl.c and pkg/
since gl.c is generated by gl.c.m4 and pkg/ is used only for packaging
A new sample for OpenGL support