Initial revision
remove the executable
add cfl, add stubs for other routines
add stubs for the remaining routines
switch grid over to use pointers to coords
add case for different slopes
first cut at interface states and update
fix left BCs -- wasn't looping down
implement the Riemann solver of Colella, Glaz, and Ferguson
interface_states.f90 -> states.f90
stop at the right time now.  Clean up some prints
restructure problems into directories
add problem specific runtime parameters.  Restructure sod
fix right eigenvalues
sod's init
only problems have inputs
fix printing of negatives
double rarefaction
restructuring for different reconstruction types
ifix comments