Driver script

[garyForeman]

Were you intending to add a script that executes an example simulation? That way I can see how all of the code fits together.

[slizb]

I hadn't realized that it was still missing, @garyForeman I'll commit and push it up. There is still a little bug that breaks the animation, so I will try to address that today on the train.

[slizb]

Okay, there is now a script under examples/ called two_body_system.R
Its not perfect, and is in need of some function extraction, but should give you an idea of the flow. I'll assign myself some issues to extract out functions to simulate_system() and animate_system(), and to fix the animation bug.

Sorry to have you join when its still messy.