Some basic functions from mootools implemented in util.js.
Also, some more DOM separation. Move clipboard focus logic into
default_controls and canvas and out of vnc.js.
JSLint cleanup.
Move DOM manipulation into include/default_controls.js and update
vnc.html to use it.
Add an example vnc_auto.html which automatically connects using
parameters from the query string and doesn't use default_controls.js.
Reorder functions in vnc.js to put external interface functions at the
top of the RFB namespace.