Added extendable and modifiable colors

I added a button to add more colors to your palette.  It brings up a colorpicker (bootstrap colorpicker, apache license, http://www.eyecon.ro/bootstrap-colorpicker/) and you can select the color you want it to be.

It writes out the color into the hash with a tagged chunk.  A/ is geometry, C/ is colors now.  The chunks are separated with ':'

Right clicking an existing color will allow the user to modify it.