Feature/rest api

[dantleech]

This PR adds a Doctrine ORM subscriber, REST API and ExpressionLanaugage and numerous other features facilitating the creation of an independent back office search.

• Added Doctrine ORM subscriber will automatically index/deindex mapped ORM documents.
• massive:search:index:rebuild command which rebuilds both the ORM and third-party (i.e. Sulu) implementations)
• Introduction of a REST API to provide a simple controller to perform a search query using parameters query, index and locale and receieve a JSON response.
• Introduction of multiple search contexts for each mapped object, possiblity to index things differently for back or front office searches.
• Added behat tests
• Category support
• Docs in separate PR: https://github.com/massiveart/MassiveSearchBundle/pull/20

[dantleech]

todo:

• Context: Different URLs (and possibly images, body, title etc) are required for backend and frontend, should add a context context=backend for the mappings.

[dantleech]

Build failure is an easy fix

[dantleech]

Updated.

[dantleech]

Updated.

[dantleech]

Have removed the REST API, and added category support.

[dantleech]

Thanks @aitboudad I have added tests for invalid field mapping.

[danrot]

Will this still work with the old search stuff in Sulu? Or should it be merged together with the Sulu PR?

[dantleech]

@danrot people should be using the tagged version so I would say it can be merged at any time.

[danrot]

Merged, but Sulu won't work with this. For the next Sulu release we have to tag 0.5.0 and https://github.com/sulu-io/sulu/pull/797 must be merged.