Add QueryWithLogin to __all__ in query.py
Minor RST docstring fixes in utils.
Add API docs for query and utils modules to docs
Add a developer documentation section to the top-level docs page.
Fix wording in docs page as suggested by @keflavich.
Skip doctest for download_list_of_fitsfiles
Merge pull request #304 from cdeil/issue_304

Generate API docs for astroquery.utils and astroquery.query