Python program using matplotlib to graph projectile motion.
* class Main displays the commands for a user to enter in the launch angle and launch speed of the projectile.
* class Cannonball contains the methods that calculate the trajectory for the projectile.
* class Crazyball is a child class of Cannonball that uses its methods to plot a projectile with a random trajectory.
* class PrintInterface contains the method to plot the projectile via pyplot from matplotlib.