Merge remote-tracking branch 'upstream/master'
Introduce SVN revision tracking.
Fix spec file parsing. Fix XML README.
Clean up for pull request.
Updated package documentation to be more accurate.
Add a CHANGES file to reflect local spec file alterations.
Merge pull request #17 from errcw/svn-rev

Add SVN revision handling
Fix the extension API compatibility check and remove non-core extensions from core packages.
Merge remote-tracking branch 'upstream/master'
Remove examples.

Now that the examples are present in the go-gl/examples repo there is no
need to have a redundant copy in the glow repo.
Merge pull request #29 from errcw/rm-examples

Remove examples.

Now that the examples are present in the go-gl/examples repo there is no
need to have a redundant copy in the glow repo.

Fixes #22.
Merge branch 'master' into core-extensions
Merge pull request #28 from errcw/core-extensions

Fix core extensions.

Fixes #24.