modified:   objects/Disc.cpp
	modified:   objects/Disc.cpp~
	modified:   objects/Disc.h
	modified:   objects/Disc.h~
	modified:   tutorials/lesson10/lesson10
	modified:   tutorials/lesson10/lesson10.cpp
	modified:   tutorials/lesson7/lesson07
	modified:   tutorials/lesson7/lesson07.cpp

Added in the physics to Disc's letFly() method. Takes in a power and angle of attack, calculates initial vx and vy, uses default x and y values. Prints out where the disc will land and what it's speed will be when it hits. Driver program (main.cpp) shows an example.