Remove unused HomeController, view, and test

The controller has been removed, there was no route to it, and the
relevant URL was redirected elsewhere some months ago.
Travis: use Elasticsearch 0.90.13; other minor tweaks

* Change notifications to default to commit author's email
* By default, run tests on all the branches
* Add ElasticSearch status reports to V1's Cucumber setup hooks
Merge pull request #22 from dpla/test-cleanup

Remove unimplemented HomeController and test