Disable local field storage

Entities are now always loaded from the API through the controller,
field storage is disabled.
Use /parts functionality of regal API

Squashed commit of the following:

commit a9a1dca32d73849c41a254bfcbaec31ad8bd240a
Author: Felix Ostrowski <felix.ostrowski@googlemail.com>
Date:   Wed Oct 22 17:05:36 2014 +0200

    Interim commit: use /parts for tree navigator

commit 1cd8d2cb8a29e51c55bf5ee6f7aadee5e0decf4e
Author: Felix Ostrowski <felix.ostrowski@googlemail.com>
Date:   Wed Oct 22 16:17:06 2014 +0200

    Interim commit: allow passing of rdf to bypass http ld deferencing

commit 916307ea912a7ea188e05abf40430635de771b6a
Author: Felix Ostrowski <felix.ostrowski@googlemail.com>
Date:   Wed Oct 22 16:15:17 2014 +0200

    Interim commit: remove superfluous methods
Implement in place (JS based) editing
Implement client-side creation of inputs
Refactor field creation
Add lookup overlay to JS editing elements
Support field cardinalities
Implement JS metadata import
Fix undefined index
Implement JS based creation of entities
Expose instances in all bundles
Add typeof and resource uri to RDFa
Support bnodes as remote_id
Fix import
Fix parent URI in RDFa
Switch ad-hoc creation to JS forms
Implement file upload via JS edit
Reload after edit
Load subtrees via ajax
Set sort /parts on insert