simbad: have list_votable_fields print get_votable_fields
First line of query_survey() response is always garbage
Add debug statement for response content
Replace BytesIO by StringIO
Removed skipif on new ascii reader
Change StringIO back into BytesIO
Updated VVV SgrA survey response
list_instruments() returns unicode
Add muse to the list of tested returned instruments
Manual addition of harps to list_instruments()
Merge pull request #430 from jwoillez/fix_for_ascii_reader

Fix for new ascii reader, BytesIO, and test suite
Modified yet again the form activation logic
Run test only if username configured
Merge pull request #429 from keflavich/simbad/list_votable_fields

Get Simbad magnitudes for a source
Merge pull request #428 from jwoillez/fix_form_activation_bis

ESO: Modified yet again the form activation logic