Made the SSOR problem generate a cooler plot.
Merge pull request #393 from insertinterestingnamehere/cython_wrapping

Further edits to the Cython Wrapping lab
Fixed a small typo.
Added a C version of the SSOR code. This can possibly be included as a
problem.
Also fixed a small typo.
Added an optional problem to the cython_wrapping lab that has them wrap a
C implementation of the SSOR algorithm.
Merge pull request #394 from insertinterestingnamehere/cython_wrapping

Cython Wrapping