Merge pull request #2 from thehutch/master

OpenGL support
Finish OpenGL20 support

Signed-off-by: Aleksi Sapon <QcTechs@gmail.com>
Merge branch 'gl20'
Removed redundant RenderMode
- Added beginning of Texture
Signed-off-by:thehutch <th3hutch@yahoo.co.uk>