Push and Pull method to SimpleVector class

Implemented two methods into Simple Vector class.
pushToTop: Adds one new value to top of array and increases array size
by 1.
pullFromTop: Pulls one value from the top of the array and decreases
array size by 1.
TriangularMatrix assignment

The homework for assignment1 complete.
File cleanup deletion

Did some file clean up and moved the location of files for this project.