initial commit of hw4
added f and init functions, and skeleton for OneStepVerify
finished writing unit test, but not working

RK3 is not correct, since I get the order of accuracy is 2
implemented classic RK3, and the convergence analysis works
came up with a working RK scheme
fixed faulty OneStepVerify.C target in Makefile
fixed faulty makefile...again
Started FixedStepVerify
FixedStepVerify is complete
added message to onestep verify
added UnitTest target