Fix bugs related to Gaia DR2 filters column names and missing filter strings within ResolvedClusterDiffRedden function. Specific fixes:
-Gaia photometry column names changed to 'mgaiaDR2'
-missing photometric strings in synthetic.get_obs_str() function added
-updated filters.py to ensure that only the revised DR2 passbands are ever used
-updated documentation for Gaia filters to emphasize that only revised DR2 passbands supported
-Updated documentation for adding filters to add that user needs to edit synthetic.get_obs_str() as well
-Improved test function test_models.test_filters() to catch failure modes with Gaia columns, missing photometric strings in synthetic.get_obs_str()
Fix bugs related to Gaia DR2 filters column names and missing filter strings within ResolvedClusterDiffRedden function. Specific fixes:
-Gaia photometry column names changed to 'mgaiaDR2'
-missing photometric strings in synthetic.get_obs_str() function added
-updated filters.py to ensure that only the revised DR2 passbands are ever used
-updated documentation for Gaia filters to emphasize that only revised DR2 passbands supported
-Updated documentation for adding filters to add that user needs to edit synthetic.get_obs_str() as well
-Improved test function test_models.test_filters() to catch failure modes with Gaia columns, missing photometric strings in synthetic.get_obs_str()