Added nearly complete Value_Function_Iteration.tex lab.
Added Value Function Lab to Vol2.tex.
Made small typo changes to value function lab.
Updated the value function lab to incorporate Alexander's suggestions.
revise euclidean algorithm

Euclidean algorithm only works with integers.

Also added package to Vol1.tex so that it compiles without errors.
added some content

Added a popular editor for Mac OSX.  Also added a little blurb about
ipython.
Merge pull request #76 from ayr0/python_tut

Fixes to Getting Started
fix counter for problems

Make counter for problems behave more nicely.  Also move all commands to
command.tex
Merge pull request #77 from ayr0/counter

fix counter for problems
Merge pull request #63 from jhendr/value

Adding Value Function Iteration Lab
Added a sleight comment to the SymPy lab.
Merge branch 'master' into sympy