Strip all animation construction from lectures/homework

[sixpearls]

Constructing animations seemed distracting for the students. We should provide a very easy API for attaching simulation results to animation objects for any system we want to animate.

[moorepants]

It may be worth noting that they only had to construct an animation in the first or second homework. Other than that I provided animations. But they did at least have a taste of how they might add their own.