Util.Debug, Util.Info, Util.Warn, Util.Error routines instead of
direct calls to console.*. Add "logging=XXX" query variable that sets
the logging level (default is "warn").

Logging values:
    debug: code debug logging (many calls in performance path are also
           commented for performance reasons).
    info: informative messages including timing information.
    warn: significant events
    error: something has gone wrong

Now working under Arora 0.5.

But not Konqueror 4.2.2 (WebSockets never connects).

IE support with excanvas still pending.

- Other misc cleanups.

- web-socket-js is from http://github.com/gimite/web-socket-js. It is
  a flash object that emultates WebSockets.

Unfortunately, events (or packets) from the web-socket-js object can
get re-ordered so we need to know the packet order.

- So wsproxy.py prepends the sequence number of the packet when
  sending.

- If the client receives packets out of order it queues them up and
  scans the queue for the sequence number it's looking for until
  things are back on track. Gross, but hey: It works!

- Also, add packet sequence checking to wstest.*

- Also slightly better performance.

- Trim unused code in base64.js