Refactored zmq stub from log module into a zmq proxy stub in zmq module. Basic log forwarding seems coded, but log needs refactoring to use and test.
Refactored log server to use external zmq proxy.
Moved log erver and client to new filenames.
Fixed missing "self" parameters on zmq_bus methods.
Merge branch 'log_refactor' into zmq_module
Docstring improvements, refactored log_server into a class.
Refactored the code to work using separate processes for zmq_bus, log_server and simple_gui.
Removed some scaffolding comments.
Removed some cache files.