Implement ElasticSearch

[imperator99]

We are currently using the database search through Search API. While it is suitable at the moment, it is not a good approach for a larger, more complex site.

To be useful, ElasticSearch will need to meet the following requirements:

• Be compatible with Search API.
• Be compatible with Search API Autocomplete or another autocomplete module.

It would also be good to get it to work with Facets, as the News and Blogs filter contains a facetted search. However, it is not difficult to run two different search systems fore different purposes.

Noting existing issue: #33.

[imperator99]

Autocomplete now available at https://www.drupal.org/project/elasticsearch_connector_autocomp. However, this module is probably not ready for production yet.