allow maximum number of catalogs to be set [warning: doesn't obviously
work]
add more informative exception and regression test
fix a regression test that had been skipped and add some essential
imports in vizier remote testing
remove last test - times out most often
Parse radius unless it is None
Add test for invalid radius value
Handle small radiuses. Fixes #369 and #370.
Merge pull request #446 from loicseguin/simbad-radius

Raise exception when radius=0 passed to Simbad query_region
UKIDSS image retrieval should inherit from UKIDSS' timeout, not
astropy.utils.data
Merge pull request #431 from keflavich/vizier/max_catalogs

Vizier query fails to parse
Merge pull request #449 from keflavich/ukidss_image_timeout

UKIDSS image retrieval should inherit from UKIDSS' timeout, not aud
setup.py -> v0.2.3