pshowWidth and pprintWidth

This pull request exposes the existing pshowWidth function, adds a pprintWidth function, cleans up a couple warnings that appear when you build with -Wall, and presumptuously version bumps it so that you can push it to Hackage immediately, if you choose to do so.

I realize you have decided to deprecate this package, but it's more useful for me that your proposed alternative because it works with any type that has an instance of Show.