[bug 820935] display what locales have translated this document
[bug 820935] add Brian Browning to contributors :)
[bug 830732] Skip MLT for redirect documents.

They are not in the index.
[bug 830732] Skip MLT for docs without current revision.
[Bug 823501] Make AAQ more like the default search

* Set a max age for questions.
* Use text_phrase queries as well as text queries.