Remove dependency on ATpy, use astropy.table.Table instead
Minor fix for md5 keyword in dust files
Use SED and Image container to return SEDs and images, which allows extra-metadata to be added. Include an iterator interface so that this does not break existing scripts.
Added tests for Image attributes and fixed bugs
Fix --coverage for Python 3
Added tests for Image for inside observer
Added viewing angles back to inside observer test
PEP8
Added tests for SED extraction
Ensure that unit conversion tests use non-zero fluxes