First attempt at solving via the revised simplex algorithm

Solves the [very basic first example given to us by Ashu for revised simplex](https://drive.google.com/file/d/0B6w9i0xWpsHWaUQxNnpVVlhhU3M/view)

Doesn't do the two-phase method.

I left a lot of inline comments for when we go back to implement two-phase.