Add read override to RegionData
Merge pull request #63 from mandli/add-read-regiondata

Add `read` function override for `RegionData` object
Removed maxmx, maxmy from calling sequences - seems to work but not yet fully tested.
Bug fix for data file closing
fixed call to setaux with maxmx arguments
notes on what was changed to eliminate maxmx and maxmy
removed tests/swirl: was out of date and not yet working as regression test
Created dev/tests directory for regression codes, not yet working
new version of fix_maxmx_notes.txt
Merge pull request #67 from rjleveque/maxmx

Removed maxmx and maxmy from calling sequences in 2d code