IRSA dust coordinates parsing
minor typo
use transform_to everywhere
attempt to fix failing tests by monkeypatching: this is probably deeply
wrong
IRSA Dust test fixes: pass names to IRSA, parse coordinates otherwise
needed a different approach to frame checking in SIMBAD
add backward-compatibility: convert "frames" to SkyCoords if needed
Vizier .fk5 -> transform_to
fk5 -> transform_to('fk5')
remove .galactic, .icrs
fix a forgotten test
Merge pull request #378 from keflavich/irsadust_coords

Use astropy coordinates everywhere