Merge branch 'search'

* search:
  Adding six requirement.
  Forcing all terms to be found.
  Cribbing mapping from haystack.
  Swapping out haystack for pyes.
Changing param names.
Fixing two bugs: dont clear mapping/index when re-indexing at offset. Pull on pip upgrades.
Merge branch 'master' into search

* master:
  Fixing two bugs: dont clear mapping/index when re-indexing at offset. Pull on pip upgrades.
Rewriting search to use Elasticsearch across feeds. Much faster, just needs indexing.
Removing stories from search index on delete.
Migration for search indexed feeds.
Default null for new search indexed field for backwards compatibility.
Searching read feeds as well.
Indexing stories on indexes feeds during feed fetch.
Fixing sideoptions container's height and width.
Merge branch 'master' into search

* master:
  Fixing sideoptions container's height and width.
Adding task to index user's subscriptions and alert them to progress.