Daniel helped make my code run better and more smoothly.  We still did not fix the camera inversion bug.
Added double rails into the simulation.  Sometimes the rails cross, but it only happens a few times.
Added the animation functionality to the textures, this is going to be a LOOOOOOOOONG commit with all of the images that I just added.
Fixed up my code a little bit more for level 4, and added my very own roller coaster track!