Handling outaux_once input parameter
Handling aux output more correctly.  Tested as well.
Fixing up core dimensional splitting routines
Adding forgotten dimensional splitting file to makefile
Updating Travis CI test to link correctly with new code
Merge remote-tracking branch 'origin/dimsplit-3d' into dimsplit-3d
Fixing 3D dimensional splitting, adding Travis test for it
Merge pull request #35 from gradylemoine/dimsplit-3d

3D dimensional splitting
Switching sense of aux output flags
Merge pull request #31 from gradylemoine/outaux

Added handling of aux output parameters
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