Minor cleanup of poxx.py

* nix the "if the string isn't long enough, add an apostrophe!" section
  because that's not needed anymore
* add some more color
Cosmetic: Fix formatting
Tweak memcached section and add trouble-shooting section
[Bug 791237] localized string  r=willkg
Add SOP section with procedure for fixing strings
Pep8 and Linting fixes.

* Trailing whitespace.
* Wrong amounts of newlines.
* "Redifinition of unused 'answer' from line 18"
[Bug 827650] Step one of questions index change.

Update the ES_WRITE_INDEXES to a new value, and make the indexing
changes to add locales to the Question model.
[Bug 827650] Localize AAQ flow

* Stage two of the ES index change.
* Opt questions app into l10n extraction.
* Opt in per locale for AAQ via settings.py. Locales that aren't opted
  in will still go to the a KB article about getting help. Currentl set
  to en-US, pt-BR, and the xx testing locale.
* Made the search suggestions in AAQ locale aware.
* Learned that we can't actually use Nose's test generators, because all
  of our tests inherit from unittest.TestCase. :(
[Bug 841107] Add css hyphenation to the cards.

This helps with languages that have really long words, like German and
Dutch.
Minor cleanup to the mapping change docs

This tweaks some language, adds some lists, and fixes some incorrect
things.
Tweak formatting of dev docs
[bug 797399] Fix wiki.models.Document.from_url()  r=willkg
[bug 821043] Change password disabling to use User.set_unusable_password()  r=willkg
[Bug 841161] Fix lightbox links.

Tobbi's crash report linker caused the dom to be rebuilt when the regex
replaced content. This was breaking click event bindings on any element.
I couldn't think of an easy way to do the crash better, so I moved the
binding for the lightbox trigger a little farther up the dom. At
@rdalal's prompting, I also switched it to the more modern jQuery .on()
function instead of .delegate().
[bug 839779] pagination is moving  r=rdalal

Im not sure where pagination is more then groups, wish this not going
to broke anything.
[bug 841767] update django
Add README I meant to add a couple of weeks ago
Add locale linter.

To use this do:

    ./scripts/localelinter.py FILENAME

For example:

    ./scripts/localelinter.py locale/ko/LC_MESSAGES/messages.po

It hasn't been exceedingly well tested and I think it occasionally
highlights things it thinks are errors but are "fine" in the sense
that they won't kick up a server error. But, I think this is a
super first pass.
[bug 843237] Add Firefox 21, default to Firefox 19.
[bug 843249] Change Firefox 17 to be the new ESR