Use HTML5 <input type=search> (closes #899)
Merge pull request #899 from acdha/html5-input-type=search

Search form <input type="search">
Use elasticsearch-py instead of pyelasticsearch.

elasticsearch-py is the official Python client for Elasticsearch.
Merge pull request #885 from HonzaKral/elasticsearch-py

Use elasticsearch-py instead of pyelasticsearch.
upgraded python3 in tox to 3.3

3.3 is a better target for haystack than 3.2, due to PEP414