Merge pull request #87 from inthause/http

Add Http/Rest resourcestree
Add Website documents
Update Website documents model
Update Default Html Response
Merge pull request #88 from inthause/documents

Add Website documents
Split Rest Resolver
Merge pull request #89 from inthause/documents

Split Rest Resolver
Add basic Http Rest OAuth
Add ZendOAuth library and update zf2 to 2.1.4
Add OAuth Exception Code
FIx travis config
Merge pull request #90 from inthause/documents

Add initial Http Rest OAuth implementation
Update ZF2 to 2.1.4
Add new attribute "stateless" on Document and Property
Merge pull request #91 from inthause/documents

Add new attribute "stateless" on Document and Property
check invalid stateless property attribute on stateless document
Update Change_Users_User Document model.
Add Http\Rest\Actions\GetTreeNodeAncestors
Update Http\Rest Response status code
Fix \Change\Db\Query\SQLFragmentBuilder::alias argument type
Merge pull request #92 from inthause/documents

Add Http\Rest\Actions\GetTreeNodeAncestors