More changes - not finished
Notify app developers when their manifest is broken (bug 850830)
Merge pull request #1120 from diox/update_manifest-rereview-email

Notify app developers when their manifest is broken (bug 850830)
Bump django
Bump amo-validator
allow filtering by language in search API
typo in the docs
add in a reason for invalid receipts (bug 756297)
Merge pull request #1124 from andymckay/756297

add in a reason for invalid receipts (bug 756297)
Remove LazyPjaxMiddleware and friends, it was never used (bug 915789)
Refactored AllowAppOwner a bit to remove the reviewer check (bug 915791)

This removes the dependency on a Tastypie authorization class.
Cleaning up AddonPremium model (bug 895937)
fix test_languages_filtering test
Updated migration 653 to account for no data.

This fixes the migration for users coming from landfill data.
Merge pull request #1129 from diox/remove-pjax-middleware

Remove LazyPjaxMiddleware and friends, it was never used (bug 915789)
Strip incoming translations in the API (bug 915656)
Implement collections API filter and fallback system properly (bug 915803)

- Filters no longer automatically include NULL values
- Fallback no longer drops filters, instead replace the corresponding
  value with NULL
Disconnect signals until last save in addon_factory
add rejected apps to list_packaged_apps management command
fix verify tests by patching right place