Shervanator/Engine — pull request #4 by Shervanator (2014-05-05 14:10:04+00:00)
Title: Remove matrix stack :(

Unfortunately the implementation I had for hierarchical
transformations in the scene graph wouldn't work in some
cases, (e.g. where I want a camera game object to
know its world co-ordinates). So because of this
I have gone back to computing the world matrix in
the scene graph. This feels ugly.. But maybe its okay!