[Bug 669682] The media search button wraps in German

See: https://bugzilla.mozilla.org/show_bug.cgi?id=669682
[Bug 714688] Update pytz to 2013b
[Bug 801583] Add more spaces between username and date of last reply.
use our own ethnio account
[Bug 862376] Hide login form in AAQ by default.

Add more instrumentation to AAQ authentication process.
Add a 100/day ratelimit on answers.

And change minute limit to 4.
Fix answer ratelimiting test for new 4/m limit.
[Bug 864856] Remove chat app.