Still moving to convert..

Move the XAALDevice.setup() to XAALInterface, and call it after device
creation

Unlike other gateway, I didn't hack the power-meter to embbed current
and voltage.. not really sure about this. Chris doesn't like the embbed
stuff.. that's why this time, I will ask him an volt/amp-meter schema.
;)

Used for new devices type

- Added motion sensors
- Added Luxmeter

I guess I missed a push on git.. so back port this missing stuff.

Code is quite production ready..

We can now add or remove zigbee devices without restarting the app.

- UperCasing name .. not really sure.
- Support for log_level in config file

I hate this singleton stuff. Now Z2MDevice have a gateway (not really
nice but can be usefull)

ignoredTopics are now in Config ;)
It's time to remove the Gateway singleton ?

Moving stuff to Gateway once again..

mqtt Handler and device parser are now Gateway funcs..
Will get ride of the gateway singleton in the next commit, I hope.

mqttSetup now use config and take a func parameter for the handler

Still a work in progress, but config parser is Ok.

The Lamp still use hardcoded properties names. It will need some work to
fix this.. which doesn't seems to be used anyways.

brightness and white_temperature are sometimes binded to Float64 (don't
ask why). So I used convertToInt()

Merged the API for all devices

API migration

Dropped the convertFloat64 for white_temperature and brightness. The
code is cleaner.

Cbor return an interface{} for everything, casting to uint64 or float64
is wrong due to the fact that xAAL schemas support both (even int is
possible). So recast everything to float64 and deal w/ that.

float64 mainly because colorful use float64 for everything, so as
brightness is Z in yxz format...

Done w/ setMode. This was tricky because setting color_mode doesn't
work.