Allow time format and scale strings to be case-insensitive
Restore compatibility with Python 3.2
Refactor wcs to use six
Disable range check for degrees_to_dms and hours_to_hms
changed quantity repr to act more like ndarray's repr
Fix #1432.  Handle parsing of simple arcseconds, e.g. '10"'
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Branch rebase and related changes
Renamed mask to array
Removed kernel test which required SciPy
Changed mask to array in kernel tests
Fixed docstring in CustomKernel
Again mask to array change
PEP8 and typo fixes