switched RichWidgets to snapshots (#dist branch)
RF-13436: added CKEditor to Gruntfile
RF-13436: upgraded CKEditor to 4.3 + its RichWidgets wrapper (snapshot update)
RF-13436: re-implemented Editor from RichWidgets
RF-13436: removing resources for CKEditor 3 and old editor.js
RF-13436: cleanup of CKEditor 3 and its resource library leftovers