fixed limiter map for vanleer, MC
fixed convert.py for 2d amrclaw and added code and auxiliary files for 2d classic
renamed convert.py to convert46to50.py
added Grady's permute function to permute indices when doing conversion from 4.6 to 5.0
improved and added to tools for converting 4.6 applications to 5.0...
Added Grady's script to permute indices, along with code for classic 2d and 3d conversion.
Open issue: classic code has different calling sequence for qinit, setaux, etc. than AMR versions.
added setrun_template_classic_1d.py
added tools to convert 1d classic codes from 4.6 to 5.0.
changed dt_variable default to True rather than 1 but allow either in setrun.py
fixed 2d typo in Makefile_classic_1d
Fixed imagediff.py to return correct value of mregression_ok and print a summary of files that differ or are missing
fixed relocatable option of imagediff.py when some files missing from one directory
Merge pull request #57 from rjleveque/conversion

Updates for conversion of 4.x to 5.0 form
added conversion script and templates for geoclaw
changed to unformatted prints in setrun_template_geoclaw_2d_shallow.py to give nicer output -- should make same change to other setrun templates
geoclaw requires use_fwaves == True
add gauges and regions properly for geoclaw converstion
Changes to data.py needed for geoclaw option to specify fgmax input files (backwards compatible)
Merge pull request #58 from rjleveque/fgmax3

Added fgmax support and fixed various other geoclaw issues
added missing bc in z to setrun_template_classic_3d.py
Merge pull request #59 from rjleveque/conversion3

added missing bc in z to setrun_template_classic_3d.py