inital changes to simplex lab
rewrote Simplex solver

Rewrote simplex solver to much clearer and more concise.
Follows the method explained just about everywhere (uses row operations
instead of matrix multiplication).
add solve method

Document more difficult to understand parts of the code.

Set NumPy to ignore division by zero errors (restore when done solving).
fix solver

Fix a few minor indexing bugs in solver

Implement Bland's Rule for choosing column and row pivots.
fix auxilliary pivot
update matrix for example problem
fix auxililary problem solver
added more detail about the matrix tableu representation

Blended Becca's explanation of pivots into the new lab.
Merge branch 'develop' into simplex
Abe's revisions.
Merge branch 'simplex' of https://github.com/ayr0/numerical_computing into ryanSimplex

Conflicts:
	Algorithms/simplex/Simplex.tex
handle negative values in RHS and ratios properly

We needed the smallest non-negative ratio.
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.
remove debug statements
add references
change bibliography style
Merge pull request #8 from abefrandsen/ryanSimplex

Revisions to Simplex Lab.
added blurb about Klee cube
Merge branch 'simplex' of github.com:ayr0/numerical_computing into simplex