handle INSERT jsf changes too

[marcorinck]

current implementation only handles jsf UPDATES, not INSERTS.

(apparently inserts are seldom used, standard mojarra jsf doesn't seem to use them at all)

[stephanrauh]

Neither MyFaces nor Mojarra use UPDATE, INSERT nor DELETE, but they do support them. AFAIK these commands are only used by ICEFaces and BabbageFaces (which is a project of mine). Also see http://www.beyondjava.net/blog/jsf-understanding-optimizing-ajax-response/.