Aperture photometry returns a Table as output
Changing tests
Fix doc examples to get doctest pass
Change output column name, add versions to metadata
Adding FLOAT_CMP to doctests
Change back output column name
Updating start page example
Fixing broken link
Changing assert to assert_allclose
Minor docs modification
Changing column names to aperture_sum and aperture_sum_err
adding unit=None in cases when data has no unit
Removing ndarray conversions to keep input units
Addressing PR comments
Merge pull request #108 from bsipocz/aper_table_output

Changing aperture photometry output to return astropy.table