Initial copy-in of 1D source
Permuted indices; removed maxmx; revamped claw1ez; added use_fwave
Adding 5.0 outaux setup; reordering loops
Starting to bring over book example chap9/acoustics/interface
1D debugged and tested, example agrees with 4.3 book example chap9/acoustics/interface
Merge pull request #39 from gradylemoine/reordered-1d

Reordered 1D
Adding setplot mimicking book Figure 9.5
Set up to use dt_variable as a bool
Merge pull request #42 from gradylemoine/acoustic-1d-setplot

Adding setplot mimicking book Figure 9.5
changed to read dt_variable as logical in 1d and 2d
Merge pull request #44 from rjleveque/dt_variable

change dt_variable to a logical variable in fortran codes to match data.py