Wrote tests for basic cannonball behavior. Set up inheritance structure
for the equations of motion and began writing runge-kutta code. Waiting on
clearance to include the Numpy module into the environment before
proceeding.
Wrote runge-kutta code for Projectile class. Energy conservation holds for
costant force field (gravity). Boundary test still fails.
Integrated new projectile object structure with existing code. Still need
to test out potential bugs.
Merge pull request #2 from pcsouza/trajectory_refactor

Trajectory refactor