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.
Also added a required prerender function to scene and application.
This function is intended to be used as a way to prepare the scene
to be rendered in its current state. For that reason, the delta
time and the current clock tick are not passed to it.
Finally got a 3D cube to be rendered. While doing it, fixed a
bug in MeshFactory that caused it to allocate the incorrect amount
of memory for each mesh.
