Add OpenGL 4.5 support.

Fix #33.
Fix "Unsupproted" typo.
Merge pull request #38 from slimsag/typo_fix

Fix "Unsupproted" typo.
Merge typo fix.
Fix typo in generated files.
Add generated OpenGL 4.5 packages.
Merge pull request #34 from errcw/gl45

Add OpenGL 4.5 support.

Fix #33, #37.