Perhaps expand documention of usage

[schroef]

I had openened a request about adding the option to call the colorpicker and adding a base/start color and position the picker. While making the post I actually started to look better add your code and noticed the colorPicker function could also have parameters when being called. This worked exactly what I was thinking of.

Thing is your read.me doesn't show any of this though. Perhaps add such additional info. I also noticed there are options we can add, but I need to go hunt in the script to find out what they area