Add Wave Mesh Tools

[erinethomas]

This PR adds all the tools required for creating WAVEWATCHIII meshes

[xylar]

Impressive work, @erinethomas and @sbrus89! For now, my suggestion would be to add a few tests to:
https://github.com/MPAS-Dev/MPAS-Tools/blob/master/conda_package/recipe/meta.yaml#L98
These can be as simple as making sure the executables are there (like the first 3) or even better running them to get a help message if that's possible.

[erinethomas]

good suggestion - ill try to get those done before the end of the week

[xylar]

I was able to build the conda package on Chrysalis so this looks great to me from a technical perspective. Let me know if you want me to test actually running any of these tools.