Removed linesweep dependency from Cython lab by swapping out some
exercises. Also made some small edits.
Updated the solutions for the Cython lab.
Re-added Cython dependency to the linesweep lab.
Merge pull request #95 from insertinterestingnamehere/cython

Update Cython lab
Merge branch 'master' into statslabs
Removed a swap file in the GMM folder
Renamed the Monte Carlo lab folder.
Merge branch 'statslabs' of git://github.com/insertinterestingnamehere/numerical_computing into statslabs
fix figures to use custom matplotlibrc

We should be using the project's custom matplotlibrc file to generate
all matplotlib plots.