Added versioning file instead of using git tags
(Step towards removing git as a dependancy in the future)
Updated gulpfile to fit with verisioning system and cleaned
up node dependancies.
Fixes#108
Since the old library was GPLv3 i changed the color picker to tiny-color-picker which is MIT.
Also extracted the styles to a shared view and move color calculation logic to javascript side.
This certainly should not be seen as the final implementation of this.
I imagine that requests like this will happen for many other colors in
the system, it might be good at some point to allow them to upload their
own stylesheet to be used.
