Styled the toggle buttons

1) Created sun and check icons using icon monster
2) created selector for toggling and applied to button backgrounds
3) created layer list to give buttons a large enough hit area
4) used the layer list to create a drop shadow for the sun.
This may be my first blogable moment.  The use of the layer list to make
the button big-enough - I have not seen that on stack-overflow; I see
them using complicated code to do the same thing.