Fix links from the VOTable validator that point back to warning and exception information in the docs.
Fix test
Merge pull request #806 from mdboom/vo/validation-results-links-broken

Fix links from the VOTable validator
attempt to refresh master
added init
fix import error
from future import now follows astropy guidelines
small changes according to astropy guidelines
got vos_catalog to work
use new str formatting for webquery
changed absolute to relative imports
moved vo server and client to new loc
renamed vo query to client; moved client and server to new package
work in progress
vo.client using new io.votable package
basic conesearch is working
working simple cone search with examples
updated conesearch doc; added cache control
expanded VOSCatalog class; generalized kwargs passing
Implement async conesearch - in progress