Merge pull request #4 from thehutch/master

Completed texture support for GL20
Merge pull request #5 from thehutch/master

Added DEBUG constant
Textures work

GL30 specific mipmap support has to be added next
Signed-off-by: Aleksi Sapon <QcTechs@gmail.com>
Added culling of the back face
- Removed redundant render mode
Signed-off-by:thehutch <th3hutch@yahoo.co.uk>