Add hascolor parameter to domoticz lights to allow for just plain dim…

[imcfarla2003]

This refactors the code in lightRequest.py to look for a hascolor config option.

If the option is available then just use a simple "Set Level" command to domoticz otherwise continue as before.

[imcfarla2003]

Also added a fix for issue #147

[mariusmotea]

From where is the "hascolor" value, because it is not present in hue api?

[imcfarla2003]

There is a hascolor key on line 304 of HueEmulator.py for deCONZ lights - As there is no other way to tell HueEmulator there is no color when talking to domoticz I reused this. Have you a better suggestion? There doesn't seem to be a way to tell HueEmulator much about a device in domoticz and specifying colour values for a white dimmable light does not work.

[stale]

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