initial commit
Added Fortran Riemann solvers for 2D advection.
added 1D shallow water fortran riemann solver.
Removed some non-existent python solvers from __init__.py.
Added a few new solvers.
Add 2D Euler and KPP Riemann solvers.
add variable-coefficient advection Python Riemann solver to __init__.py
add variable-coefficient advection Python Riemann solver to __init__.py

Add .gitignore file.
Merge branch 'master' of github.com:clawpack/riemann
Add nonlinear elasticity python solver.
add nonlinear_elasticity.py
Made meqn, mwaves global variables within each Python Riemann solver.
This allows them to be used easily to set grid.meqn and solver.mwaves.
Merge branch 'master' of github.com:clawpack/riemann
Add dummy transverse Riemann solver for use with dimensionally split algorithm.
Replaced Riemann solver 2D shallow water: now the gravity constant is passed as a parameter in cparam
Merge branch 'master' of github.com:clawpack/riemann
Change comrp to cparam (common block name).
Fix various bugs and update names.
Updated p-system Riemann solvers.
Add Riemann solver for 2d advection equation in annulus