Color State incorrect when fading color (transition is set)

[alexschwantes]

Given the fix for #18 there is now a new bug that is visible where the returned state is incorrect.
When in JSON mode and an MQTT command is sent to change the color the following is observed:

Changing color without transition works fine

SET: { 'color': {'r':0, 'g':255, 'b':0}}
STATE: {"state":"ON","brightness":145,"white_value":0,"color":{"r":0,"g":255,"b":0}}

but when a transition is set, it returns the state of the first step in the fade sequence rather than the actual set color. ie.

SET: { 'color': {'r':255, 'g':0, 'b':0}, 'transition': 4}
STATE: {"state":"ON","brightness":145,"white_value":0,"color":{"r":1,"g":254,"b":0}}

The returned color state is wrong.
This is related a bit to do with the flow of the program and the way the fade changes the m_color variables instead of setting m_color to be the final color and using other variables to handle the fading.

[alexschwantes]

Pull request for this issue is #23