[HOpenGL] ANNOUNCE: OpenGL 2.2.3.0

[Sven Panne]

A new version of the OpenGL package has bee uploaded to Hackage. This is 
a feature release, containing the following changes and additions:

  * Added support for GL_ARB_copy_buffer, GL_ARB_depth_buffer_float, 
GL_ARB_half_float_pixel, GL_ARB_texture_rectangle, GL_EXT_packed_float and 
GL_EXT_texture_shared_exponent extensions.

  * Added missing parts of GL_ARB_vertex_shader extension.

  * Announce that we support MESA_ycbcr_texture and APPLE_ycbcr_422 
extensions.

  * Improved generic vertex attribute array API.

  * Added support for unsigned integral uniforms.

  * Added more GLSL type tokens.

  * Added missing query for texture size limits.

  * Include missing aclocal.m4 and README in source distribution and removed 
unused Makefiles and prologue.txt.

  * Added 2 hacks to determine the Haskell equivalents of 
GLchar/GLintptr/GLsizeiptr with ancient GL headers.

  * Added Vector1, Vector4 and Vertex1 data types for orthogonality.

  * Added Functor, Applicative, Foldable , Traversable, Typeable and Typeable1 
instances for all vertex attributes plus all possible derivable instances.

Cheers,
   S.