CMS-1786 Convert contentType_get to use value objects
Fixed bug in ContentJson - ContentData was to be printed as array of Data
Removed uneccessary method getName in FormItemSetJson and MixinReferneceJson
Removed no longer needed InputTypeJson.isBuiltIn since "custom:" is not a part of the name of the type
Changed ContentTypeResource.get to only accept getting one content type.
Moved getting ContentType as XML (config) to own request method: contentType/config and changed it to support only getting one content type
WizardPanel.persistedItem: Had to use type any as long as we do not have a common thing when we are mixing new and old types of entities (remote interfaces vs new in each domain)
module.ts: To easier mantain references to TS-files I started having a module.ts containing all references needed for each module.
api_schema_content_form_json: Added interfaces for the form data coming from the new ContentTypeResource
api_schema_content_form: Made form classes support creating from json
Got api_schema_content.ContentType and ContentTypeSummary in place
Created new ContentTypeRequest classes for requesting against new REST API
Started to use new REST api and request classes for fetching Content and ContentType in ContentManager app.