[WIP] An options dialog to allow setting of the background highlight for added...

... and deleted lines. JS color picker from http://jscolor.com/ . Haven't figured out how to use the values in style.css yet.

For some reason, while the previous values are being set in the options fields, the fields' bg colour is not being updated.

Also, I have no clue what I am doing.

![image](http://illuminarti.weebly.com/uploads/1/6/7/7/16779426/5500067_orig.jpg)