* AMDs new driver fixed many issues in the OpenGL driver. No reason to
keep these hacks. In addition the upgrade to 4.3 guarantees the
existance of required extensions, so no need to check for them
* renderer_opengl: Namespace OpenGL code
Namespaces all OpenGL code under the OpenGL namespace.
Prevents polluting the global namespace and allows clear distinction
between other renderers' code in the future.
* Also namespace TextureCubeConfig
emufan4568
Tobias
Lioncash
wwylele
Markus Wick
Phantom