Added empty chebyshev algorithms lab.
Fixed another typo.
Changed .gitignore to ignore any build directory.
Changed .gitignore to ignore all .mod files from fortran modules.
Modified sections in .gitignore.
Added another file to ignore to .gitignore.
Added fssor.f90
Added fssor.h.
Added cython_fssor.pyx
Added fssor setup file.
Added comments to cython_fssor.pyx.
Added Fortran wrapping problem to the cython_wrapping lab.
Added a brief discussion of Fortran ordering vs. C ordering to the
wrapping with Cython lab.
Adding the shooting lab
Left out a couple of key steps in the description of the Cepstral
coefficients, so I added them in.
fixed spacing issue in mst lab.
Modified a few questions for increased accuracy and understanding.
Fixed yet another mistake.
Merge pull request #388 from abefrandsen/cepstrum

Cepstrum
modify profiling lab

Add to a list of suggested labs to profile and optimize.

Also fixed a typo in one of the examples.