Update config over the air

[sjefferson99]

Have a web page show the config values and allow you to update them.
New config would be written out to config file and reinit/restart to apply.

[sjefferson99]

I think it's possible to parse a human readable config.py file and output it as equally readable after updates, but it seems much simpler to use json.dump(config_dict, filename, indent = 4) to make it fairly human readable for hacking and dev, but very python readable and rely on a config web page for truly human readable non-coders to interact.

This will require:

• Refactoring the config file into JSON (including the config checker as this will be crucial for OTA changes to config and firmware) - Logged issue Refactor SMIBHID config.py into config.json #250
• Writing some config import/export methods in the config manager module - Also on Refactor SMIBHID config.py into config.json #250
• Loading the config values into a module called config or refactoring every module that uses config.py
• Configure a web server - Done on Add a webserver to smibhid for admin purposes #248
• Writing a basic web UI that shows all config values and allows updating and saving (can expand into type checking and fancy widgets for incrementing numbers etc. and displaying which entries need a reset to apply).
• Call check config before applying to improve the odds of surviving a config change
• Write out config changes to the config.json file