Row background colors

[linuxras]

First thanks for making this extension.
I needed to be able to set the background color of the rows in a list dynamically so I went hacking around.
While in the code I also implemented an alternate for colors option and a selection option as well.
I did not get a chance to update the language file but the functions all work so far.
Try it out and let me know what you think.
NOTES:

1. You cannot use both at the same time, if you turn on UseAltRowColors it will override the color the moment something is selected.
2. I had to remove the touch-down/touch-up color change for this to work, figured having a visible sign of what item is selected is worth more than flashing a color on touch as a result the touch colors are used for selection instead.