* Added Django 1.5.7 to requirements
* First implementation of search using elasticsearch with facets
* Advances in elasticsearch implementation of searches
* Implemented missing filtering and sorting operators for search form
* Documents in ElasticSearch are created, updated, and deleted along
  the database products
* PEP8 compliance
* Created new names for ElasticSearch enabled forms and fields
* Recovered legacy fields and base search form to ensure compatibility
  with existing apps
Merge branch 'feature/elasticsearch' into develop

* feature/elasticsearch:
  * Recovered legacy fields and base search form to ensure compatibility   with existing apps
  * Created new names for ElasticSearch enabled forms and fields
  * Documents in ElasticSearch are created, updated, and deleted along   the database products * PEP8 compliance
  * Implemented missing filtering and sorting operators for search form
  * Advances in elasticsearch implementation of searches
  * First implementation of search using elasticsearch with facets