Evaluate integration with Nuxeo Studio

[mkalam-alami]

• Ability for third-party developers to view/contribute to the model
• Support for web contributions (XHTML, etc) OK
• Documentation capabilities
• Integration in Maven OK (after patch by akervern)

Limitations found :

• Since Studio can't define Facets (and there are a lot ex. SoaNode, WsdlInfo), they must be predefined (textually in file in Eclipse) and imported in Studio as JSON. But what's worse, their fields can't therefore be seen or used in Studio, which becomes then far less useful.
• Maven artifacts are not available to those who don't have Studio accounts