Correct index order in comment in rpn2_vc_advection.f90.
Merge pull request #78 from ketch/comment_indices

Correct index order in comment in rpn2_vc_advection.f90.
Document solver constants and indices.

The comments in each normal Riemann solver now include:
- The number of waves
- The number of conserved quantities
- The number of auxiliary variables
- The names and indices of the conserved quantities and variables

A short script extracts these values and writes them to Python modules
so they can be imported and used in Python scripts.

Ideally, this would be implemented without the extra Python modules
by putting the Riemann solvers in modules and using module data.
This is a simple solution that doesn't require any drastic changes.
Make travis run nosetests from pyclaw/examples.
Change common block name back to comrp.