Added show/hide interface toggle.
Small transactions now show <0.01 instead of 0.00
Switched Mt.Gox from Socket.io to Websocket

The Mt.Gox Socket.io connection was flaky all around. Websocket seems to
be behaving better.
Fixed block sound (oops)
No two consecutive block sounds are the same.

Also, minor formatting fixes.
Added secret.
Added option to scale pitch with transaction size
Merge pull request #2 from Roujo/master

Added option to scale pitch with transaction size
Minor changes.
Scale pitch option initialized to checkbox state.
Scale pitch now checked by default.
Merge remote-tracking branch 'upstream/master'