Status Report 4

Patrick: Refactored physics engine to use the solve_ivp family of functions (which gives us event functions). Broke physics five times, then added tests to make sure they don't break again.

Sean: Adding captions and basic keyboard input handling. Got more textures for planets.

Ye Qin: Trying to find different ways of integrating solutions

This week was a big homework week (CS 343 and CS 454) so less work.