Merge pull request #131 from ozkriff/master

Updated to latest Rust: priv/pub
Fix stupid mistake with Major/Minor hints

o_o
Merge pull request #133 from bjz/fix-hints

Fix stupid mistake with Major/Minor hints
Add documentation regarding OpenGL on OS X
Merge pull request #134 from bjz/osx-hint-docs

Add documentation regarding OpenGL on OS X
Enabled get_###_version()