New config format, MQTT support and other small improvements :)

To simplify configuration of the device now all settings are in a single place!

Format syntax:

• empty lines and lines starting with a hash (#) are ignored
• other lines are expected to be in key=value format

If lists are needed there are tools to split strings on commas, so it's possible to specify multiple owmIds like this:
owmId=1,2,3,4,5

The old config is not migrated, you will have to update it yourself by hand.

The LHC task is still disabled (and now it's even broken), code for Fixxer.io was removed.
New SerialCommandTask is available to query the device.
$var_name for readout of variables (including things like up-time and ip address
$var_name=value to set variables (to test something quickly by changing params)
reboot :)

There's also an MQTT task that can report LocalSensorTask readouts and also replies to variable requests.
By default the device name is InfoClock.