[bug 825617] Remove the rest of webtrends.
[bug 746564] Replace 'request.locale' with 'request.LANGUAGE_CODE'
[bug 839448] Fix resend confirmation email edge case

If the user registers, then gets an activation email, then clicks
on the link thus activating the account, then the corresponding
RegistrationProfile is cleaned up, then the user clicks on the
link again, the code would traverse a path where it tries to
render a Jinja2 email template using the Django template renderer.

This fixes that. Plus a test case.
Add locale field. Do DB migration.
Fix typo (reported by Tonnes).
[Bug 799411] Fix pluralization of "1 replies" with ngettext.
[bug 839417] Replace custom js with input type="number" pattern="\d*".
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