Restore compatibility with Python 3.2
Refactor wcs to use six
Disable range check for degrees_to_dms and hours_to_hms
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
Fixed division error and removed boilerplate code
Added discretize function