web staff : xul integration experiment

web staff : xul integration experiment

Trying to see if it's possible to run these UIs from within XUL,
potentially easing integration and testing.

Notes:

 * cookies / localStorage need XUL pass-thru's
 * to use websockets, a global (xul-level) websocket connection would be
   required (to avoid per-tab connections).
 * we'd probably want to trim out the nav bar along the top
 * debugging is a pain in the butt.  For some reason, not all errors
   bubble up to the console.  and console.log() no workee.

Signed-off-by: Bill Erickson <berick@esilibrary.com>