Add include_obsolete switch to Vizier.find_catalogs()
First commit handling tables as a coordinates input.
Add UCD1+ to metadata returned by Vizier queries
Raise TypeError() instead
Always request computed columns "_RAJ2000" and "_DEJ2000" in decimal degrees.
Initialise empty column to single wild card.

We at least want the default columns.
Drop the double wild card optimization, it overwrites the _RAJ2000, _DEJ2000 request.
Now use "_RAJ2000" and "_DEJ2000" by default, for table-based query.
Request a reference to the input table when using a table-based region query
Do not override columns, and default columns to ["*"].

This is needed to request the "_q" column when querying a region with a
table.
Fix a test that started failing because of the default column=["*"]
Defaulted column_filters to {}.
Merge with instance column_filters, rather than replace.
Fixed test for column_filters change.
BUG: Tables with identical names should concatenate, not overwrite eachother.

Made use of VOTABLE’s ref in TABLE element to identify concatenations.
VOTable's TABLE cannot convert to astropy's Table if it contains no data.
DOC: Added documentation for queries with table.
DOC: Fixed a wording error in the previous vizier doc addition.
DOC: Updated query_region documentation for Table use.
Merge pull request #256 from jwoillez/vizier_table

Use Table as acceptable Vizier input