Added GetUniformBlockIndex and UniformBlockBinding.
GLEW version requirement now 1.8.0.
Workaround GLEW bug: C wrapper to silently cast GLchar into char.
No need for GLEW 1.8 now thanks to C workaround, reverting README.md.
Merge pull request #128 from Niriel/uniform_blocks

Added GetUniformBlockIndex and UniformBlockBinding.