Added edit person functionality.

- Updated newDesignScript.js —> updatePerson()
- Updated eventBinding.js —> added bind to our btn_save
- Updated FacadeInterface.java —> editPerson(String json, long id)
- Updated PersonFacade.java —> @Override editPerson(String json, long
id)
- Updated PersonHandler.java —> added functionality to the case “PUT”
in the handler.
- Updated Person.java to return roles and replace roles

NOTICE: THE “EDIT PERSON” FUNCTIONALITY ONLY WORKS WITH A SERVICE LIKE
POSTMAN, BUT NOT VIA OUR OWN SOLUTION. THEREFOR THE SAVE BUTTON IS
GREYED OUT.. FOR NOW!

Commit: Christopher