This experiment provides a 1D shocktube in which Riemann problems can be
investigated. Specify the initial state left and right in 'riemann.lua'.
ateles.lua makes use of the definitions in riemann.lua and describes the
simulation settings.
The riemann.lua can be used as input for solve_euler_riemann, which solves the
the riemann problem exactly.

ateles.lua is configured via a set of environment variables.
Use run.sh to actually run simulations, it will run ateles and harvester one
after the other. Set the $HARVESTER and $ATELES variables accordingly to
point to the corresponding executables.

First tested with:
ateles:9a8b5c51d2db (previous versions required spectral viscosity settings
                     for the covolume, this version has this removed, and
                     skips the damping factor evaluation if none is given)
harvester:fd7615611507
