Better color code parsing in StringModel

Signed-off-by: Aleksi Sapon <QcTechs@gmail.com>
Instanced string rendering

Signed-off-by: Aleksi Sapon <QcTechs@gmail.com>
Created TextureAtlas for combing multiple textures into one

- Improved InstancedModel structure

Signed-off-by: thehutch <th3hutch@yahoo.co.uk>