LightwaveRF lights could not be dimmed properly as they require a dim level
of betwene 0-32. The Domoticz documentation incorrectly states this should be
0-16.
Other devices may use different values which is why the MaxDimLevel property
should be used rather than hardcoded value.
Also refactored the code slightly.
Fixed issue that 'on/off'-type lights showed as dimmers in HomeKit.
Checking now on SwitchType instead of HaveDimmer
Fixed issue that 'on-off'-type lights would not react on Siri 'Switch
on/off light'; On/Off types are now handled as Lights instead of
Switches
It seemed to be easier all around to use NPM to manage the dependancy on HAP-NodeJS.
This PR removes the submodule, and adjusts the paths of all checked in shims to reference the NPM module instead.
I also updated the documentation to reflect the simpler install ;)
