initialized eclipse project
it works, but fix your test
deleted sqrtTest, finished partB, but not the most efficient. still good though
part c is finished, but we must comment and format and write the exceptions. Probably need some help with that.
kinda broken but added stringEvaluate
exception stuff should work
added equality tests and made checkString method private
added 2 exception classes
please work
Conflicts:
	src/edu/grinnell/csc207/groupgroup/utils/InvalidInputStringException.java
	src/edu/grinnell/csc207/groupgroup/utils/UnknownRegisterException.java