Added image scene to render an image in a scene. There is also now
a testing image that is an uber meme. Currently the problem is
that the spritebatch cannot use the offsetof macro because it is a
templated class. Possible solutions to this are changing it to be
specifyable or implemented per vertex type as the other batches
have been.
Want to use seperate textures and samplers for the scene to allow
for more modularization. Currently have created a texture class
and started creating a scene class.