Add elasticsearch
This MR adds the Elasticsearch to the project.
It is hided by the basic json api search options and includes an additional query parameter q
that is used to query for some text within all the fields.
Also it now powers all other filters as well - which is necessary as the elasticsearch handles pagination itself.
It currently doesn't include any further snippets (to maybe display where the match of the q
parameter was). This may be a topic for later.
Edited by Nils Brinckmann