Add admin action to index resources
Refactor resource listing, implement search

When listing resources, the elasticsearch index is now queried instead
of regal API. Listing includes simple fulltext search.

NOTE: Clean URLs need to be enabled for search to work.

TODO:
  - ordering of search results
  - restriction of search to certain fields
  - update all listings to use elasticsearch
  - AJAX
Fix empty listing and indexing

Fixes EDOZWO-189 and EDOZWO-188
Add elasticsearch to all resource listings

TODO:
  - customizable rows in result listing
  - ordering of search results
  - AJAX
Merge branch '0.1.2' into elasticsearch
Merge branch 'master' into elasticsearch
Merge branch '0.1.3' into elasticsearch
Remove unnecessarily thrown exception
Merge pull request #15 from literarymachine/0.1.3

0.1.3
Merge branch 'master' into elasticsearch
Refactor bulk import to updated API listing

Fixes EDOZWO-185
Merge branch 'elasticsearch' into 0.2.0

Fixes EDOZWO-89
Fix listing for hits containing multiple graphs

Fixes EDOZWO-223
Refactor saving resources to API
Add admin actions for URN and transformers

Fixes EDOZWO-224
Add tag for custom elasticsearch EntityFieldQuery

Fixes EDOZWO-222
Fix URN generation call URL

Fixes EDOZWO-231
Add labels and API links to list of transformers
Merge branch '0.2.0' into test
Merge branch 'test' of https://github.com/edoweb/regal-drupal into test