#603 translate clip region to pad all sides evenly

Note: you have to add .clipPadding(10) to all the examples to see this fix work!!! I didn't set the default _clipPadding bc the bar graph example added a partial bar at the end of the x axis and since I did not understand why it did that I chose not to introduce the default. However, this does make all the examples a little nicer because they no longer get chopped off. All unit tests passed, too.