Calibrating colors / white balance

To make myself a little bit clearer:

currently, when setting up a fixure, you define hardcoded color channels like red, green, blue, white for that fixure. This is very unsatisfying, because:

- what red??
- how intense is it?
- what is its quality (bandwith)

It should be like this:

- Have predefined dummy-colorspaces like RGB, RGBA etc. for easy setup.
- Have more precise colorspaces like "RGB-Eurolight-2015" for certain mutlichannel Chips that appear in different fixures.
- Give possibility to edit those colorspaces and create new ones.

Inside the colorspace, have the following configurable:
- Name
- Number of channels

Inside each Channel, have the following configurable and have a little library for predefinition:
- Hue of the channel (0-360)

- quality of the channel (bandwith) 1 = LASER, 0 = fullspectral white
- Gamma of the channel (exponent)
- Intensity of the channel (factor)

A dummy RGBW colorspace would look like this:

# name, hue, quality, gamma, factor
'red', 0, 0.8, 1, 1
'green' 120, 0.8, 1, 1
'blue', 240, 0.8, 1, 1
'white', 0, 0, 1, 2

Add 'by colorspace' to color-palettes to the palette, because for a colorpalette, a certain RGB-LED-Chip is the same regardles of the fixure that might have a pan and tilt or some strobe channels.