Switched to correct astropy object.inv
small fixes to get rid of sphinx warnings
Clean up namespace to get rid of sphinx warnings
Moved LAMDA and calculator links so that they are recognized correctly

The actual problem is that there was no whitespace, although I've moved
it to the end for clarity
Fix headings to use "-" as second level instead of "~"

Automodapi's headings have to be consistent with the rest of the page,
so either use the =-^ sequence it uses, or use the ":headings:"
directive of automodapi.  I did the former because it makes things
more consistent with astropy.
Fix underline to be correct length
update gitignore to include docs/api and astroquery.cfg
change astropy link to the existing one

astropy.sphinx.conf in the astropy core package adds a n astropy_
link, so having *another* one here was triggering a warning
Merge pull request #269 from eteq/astroquery-doc-tweaks

Astroquery doc fixes
add ToolClass to each __init__ so that autodoc will work (and it's
harmless to give users access)