Abe's revisions.
Merge branch 'simplex' of https://github.com/ayr0/numerical_computing into ryanSimplex

Conflicts:
	Algorithms/simplex/Simplex.tex
Added plotfigs file and a figure to the lab. Added more explanatory
content, especially in the pivot section. Commented out the sections
dealing with the alternate tableau.
Fixed small typo.
Merge pull request #8 from abefrandsen/ryanSimplex

Revisions to Simplex Lab.