Creating GentMcWilliams.py

GentMcWilliams.py attempts to recreate Fig 1a of the Gent and
McWilliams paper.
Updating .gitignore

Added *.nfs.* files to ignore list.
Creating GentMcWilliams.py

GentMcWilliams.py attempts to recreate Fig 1a of the Gent and
McWilliams paper.
Added imports to cheb.py
Update ignore list
Add exception handling to GentMcWilliams.py
Parameter changes
Major update to GentMcWilliams.py

Added normalization to confirm that eigenvectors agree. Added
command-line option parsing to be able to run new cases without
modifying code (see python GentMcWilliams -help).
Automatically choses plot type based on parameters (eigenvalues only).
Minor updates.
Updated printing
Minor changes
Merge branch 'GentMcWilliams' of https://github.com/bastorer/GeoFluids into GentMcWilliams

Accidentally had conflicting copies, merging now.
Create Vortex Models directory
Merge pull request #2 from bastorer/GentMcWilliams

1D QG Vortex