Registry_test all test cases now pass for discovery

Set up test case for the final discovery test. ...

Test not run yet, and code is missing, marked with ####HERE####

Join_ack working on discovery mode autojoin

Most test cases for discovery modes implemented and passing

Auto discovery tested and working with accept

Initial outer testing of 4 discovery modes done ok

Framework of discovery methods in place, ready to TDD

Design for discovery agents done

Can now construct a device class instance from its product_id

Default incoming message callback added to router, for logging/debug

Router unknown message handling callback registration is cleaner

Neater callback mechanism for device class instances to use. ...

This new architecture ensures default message processing always happens

Synthetic receive working in monitor_mihome.py

energenie.loop() written with FSK receiver connected to fsk_router

Router ready to be tied into a loop()

switch.py renamed as control_mihome.py, rewritten for new OO interface

legacy.py rewritten to use new device class interface

Tested on Raspberry Pi, all 4 testers still work with new Message()

Improved debug output for testing

Ran all test cases again (no hardware), fixed a few issues. ...

Need to still run this up on the hardware to test properly

Code now ready for regression testing with new Message() wrappers added

Refactored usages of raw message to use Message() ...

Removed all usages of showMessage, alterMessage

Marked with ##HERE markers the refactoring required for new Message() ...

Disabled alterMessage showMessage and createMessage to force this issue

OpenThings.Message tests now completed

PARAM_NAME key syntax for OpenThings.Message [set] tested ok

OpenThings.Message now tests attribute set and get. ...

Added decorators for @test_0 and @test_1 to turn tests on and off selectively

setattr tests done on OpenThings.Message

Tested all attribute read services in OpenThings.Message

OpenThings.Message test harness keyed paths tested and working

Characterised usage modes of OpenThings.Message better