Rename config.php to config.example.php.

This is easier when you're testing directly in the git directly.
Display latest versions of OpenGL first.

Copy all the versions in an array and `usort` them from highest version
to the lowest. OpenGLES versions come last.
Hints had to be aware of this sort so that first numbers begins at the top
of the page.
Add config.php to .gitignore.
Fix license headers, add license header template

Instances of 'libbench' were replaced with 'mesamatrix', and instances of
'GNU Lesser General Public License' were replaced with
'GNU General Public License'
Merge pull request #17 from Xenopathic/master

Fix license headers, add license header template