Clawpack 5.x API

We discussed the following APIs:

• Output file formats: would benefit from a more concrete definition.
• Riemann solvers: rp1 is documented at http://www.clawpack.org/riemann.html. Need to add signatures for 2D and 3D solvers.
• stepN: This is stable. The code is the documentation.
• limiter: We should add documentation in case the user wants to supply a limiter.
• Boundary condition routines: documented here for Fortran codes; here for PyClaw. The PyClaw documentation is outdated and wrong!
• PyClaw Geometry objects: documented here.
• PyClaw "hook" functions: we should probably provide more documentation of them here or in a reference.
• setplot object: documented here. Randy says this may be outdated.
• setrun.py: documented for AMRClaw, GeoClaw, and Classic.