Added: Example how to change the background of the UITableView and UITableViewCell

Hey @AppleTechOnline,

I have implemented an example how to change the background color. You have to set the background color on the table itself which has to be done in the ```viewDidLoad``` method and on each table cell which is done by iterating over each table cell in array in the ```willDisplayCell```.

Keep in mind that the colors are percentage-based RGB colors, so you need to convert your HEX values using a converter like http://andylangton.co.uk/tools/colour-converter.

Enjoy,
klarstil