It is *crucial* that the checkboxes match the defaults on the ESO page!
We need tests for DP.ID in table.colnames!
1. Include dp.id
2. Let users in the ipython terminal know that something's amiss
check for ERROR state from the data_retrieval service (else, infinite
loop!)
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check for cached tar files
when using schema to validate inputs, check for six.string_types instead
of str
add test for unicode in schema
add test for column filters too
Merge pull request #346 from keflavich/eso_bugfixes

ESO bugfixes
Merge pull request #348 from keflavich/vizier_schema_unicodebyte

Validation in schema should use six.string_types