Encode bert safely so as to not make unlimited atoms
Simple postbacks are working.

Still need to make sure wf:q retrieves the postback values though, and
could almost certainly cut the pageContext out of the message sent to
the browser, and instead just send it from the server to the client to
be used in case the websocket connection isn't working.
Query Handler mostly working.

Let's make sure pagestate is only being relayed back to the page if
something changes.  We can conceivably cut down on the size of the
pagestate by cutting out additional handlers (just like how config
handler doesn't get relayed to the browser).