* Refactoring export to json to use new style objects
* Added convenience function to Object API to get identifiers as strings
* Updated tests for ExportAsJSON
* Fixed bug with parent composition not being updated with new ID. Also rewrite IDs in configuration etc. Fixes#2042
Added context actions for importing and exporting JSON representations of domain objects. Added FileInputService for triggering file picker and retrieving uploaded data. Also added a File Input form control for integration with MCTForms.