Chat demo/API auth test:  Updated the API key information that is displayed when chatdemo.py is run to reflect Gate One's new settings format.
utils.py:  Fixed a bug in create_signature() where it wasn't working when given unicode strings.  This should correct issue #203 (https://github.com/liftoff/GateOne/issues/203)
gateone.py:  Added a little extra debug information when an exception is encountered trying to execute a WebSocket action (only if --logging=debug).