Added category to UITableView that takes a view as input and figures out the indexPath of the cell containing that view based on the view's center point. (Tip of the hat to Brian Slick for the idea, which is apparently based on an existing open source category on UITableView.)

Changed the MyTableViewController class to use the new UITableView indexPathForCellContainingView category method to figure out which cell was tapped rather than using button tags, which are a pain to set up and hard to maintain.

Reworked the StaticTableParentProtocol so it's clickedButton method returns an index path rather than an integer cell number (This makes the method useful for tables with multiple sections)
test commit