Merge remote-tracking branch 'upstream/master'
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.