First runthrough of key grammatical editing
Second round of grammatical edits
A few final touch ups
Quick preliminary run-through with spellcheck
Fixed a few inaccuracies
Added a currently commented-out diagram using TikZ
Fixed typo and changed emdash to double hyphen
Clarified intro/some problems/pcolormesh section; general fixes
BIG changes to the complex lab
Added Poisson's Equation for Electrostatics Example to Poisson Lab
Clarifications and Grammar, along with diagrams
Merge branch 'develop' into DataStructures
Merge branch 'develop' into KevinB
Uncommented 2d Poisson
Small corrections
Removed graph.pdf, inserted two tikz diagrams
Bidirectional Graph added, final glance over
Corrections to Conservative Forces section
Updates to Poisson lab - Joshua
Merge branch 'poisson' of git://github.com/forrestglines/numerical_computing into poisson_revision

Merge revisions of Poisson lab.