Refactor/fix mark-as-read-while-reading workflow.
Merge pull request #235 from ojiikun/master

Android: Fix Mark-As-Read-While-Reading Workflow
Using haystack and elasticsearch for a third autocomplete feature.
Removing Redis autocomplete. Upgrading elasticsearch.
Overriding haystack elasticsearch url.
ES requires valid url.
Merge branch 'master' into circular

# By Samuel Clay (4) and ojiikun (1)
* master:
  ES requires valid url.
  Overriding haystack elasticsearch url.
  Removing Redis autocomplete. Upgrading elasticsearch.
  Using haystack and elasticsearch for a third autocomplete feature.
  Refactor/fix mark-as-read-while-reading workflow.