Hotfix for issue #163
Fall back to non pretty JSON for PHP5.3
hotfix for installed resource with data object

if the installed resource wrapped the object in a Data object themself, just return this object.
Added is_semantic test to the default serialisation in HTML
Set the different supported source types with their possible parameters in the body property of a method in the discovyer document
Describe what a proper identifier is
Fix UI to accept new Content-Type
Merge hotfixes branch