Cache index.html for commonplace projects for a few minutes (bug 1071468)

Those pages are served by us, not the CDN, so we can afford to cache
them for a few minutes to help repeat views. If a client wants to bypass
the cache (for instance when we push to production) they can hit reload,
their browser will send a If-Modified-Since or If-None-Match and we'll
give them the new content.
Allow clients to select a bigger max-age (bug 1088361)
fix irc channel

No idea where #app-comm came from!
Merge pull request #2678 from diox/client-choose-cache-control-duration

Allow clients to select a bigger max-age (bug 1085739)
Only show FxA migration when the banner is up (bug 1088610)
Use Django's RequestFactory in favor of test_utils.

The test_utils RequestFactory added 'wsgi.input' but Django has been
doing this since 1.4.
Commit from Mozilla Verbatim by user civas.: 1992 of 1992 strings translated (0 fuzzy).
Merge branch 'master' of ssh://github.com/mozilla/zamboni
Commit from Mozilla Verbatim by user Mikk.: 1984 of 1992 strings translated (0 fuzzy).
Script conversion from Serbian Cyrillic to Latin (20141027)
Merge pull request #2679 from diox/cache-commonplace-views

Cache index.html for commonplace projects for a few minutes (bug 1071468)
Consider an app complete with either support email or URL (bug 1076243)
Merge pull request #2684 from diox/suppory-email-or-url-hotfix

Consider an app complete with either support email or URL (bug 1076243)
Merge pull request #2683 from flodolo/20141027

Update sr-Latn using sr (Cyrillic) content converted with icu4c
Move away from django/test-utils.

Django test-utils is outdated. We are moving a few things into our own
test setup and switching to Django's test cases.
Allow anonymous users to validate hosted apps (bug 1090341)
Merge pull request #2685 from mstriemer/anonymous-hosted-app-validation-1090341

Allow anonymous users to validate hosted apps (bug 1090341)
handle feed items in ES that don't have feed element data (bug 1088001)
Fix double encoding of search queries in pagination meta (bug 1090239)
don't effectively limit on commbadge api for review history (bug 1090436)