Remove LazyPjaxMiddleware and friends, it was never used (bug 915789)
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)
Disconnect signals until last save in addon_factory
check price tiers and add that into exclusions before indexing (bug 909532)