Display need

Add FOSRESTBundle for REST API

Currently only displays the need name, the associated strategies are not
displayed.
Improve serialization

Add visitor that creates serialization format expected by Ember Data.
Bugfixes to Relations

The type comments of Need, Strategy and Need2StrategyConnection were the
wrong way around. This is now fixed.
Fix names (singular/plural) to reflect the changes.
Add ArrayCollection init to constructors of Need and Strategy.
Update readme with new feature on todo list.
Serialize with camelCase

Ember expects the field names to be CamelCase.
Change serializer naming strategy to reflect that.

See https://github.com/schmittjoh/JMSSerializerBundle/pull/270 and
https://github.com/schmittjoh/JMSSerializerBundle/pull/139
Rename relation table
Avoid lowercase when serializing
Update Ember Data and Ember

Update Ember Data to 1.0.0-beta7
Update Ember to 1.4.0
Create bower file
Display strategies in need view

Add new model for defining relations.
Update template
Merge branch 'feature/display_need' into develop