Resolve issue 766
Added docstring for test_any_facet describing why it is necessary to test the truthfullness of a Query object
Merge pull request #114 from Aaron1011/Issue-#766

Resolve issue 766

Adjusts faceting code to act differently in the case of '' vs. key missing.
Merge branch 'master' of https://github.com/openhatch/oh-mainline

Conflicts:
	mysite/search/view_helpers.py