RufasSwap v2.3.1 file

Rufaswap is a simple permuted picture puzzle where the challenge is to restore the picture elements to their proper order. Two elements are selected with cursor clicks to initiate a swap. User controls the level of difficulty. * Added Mac binary bundle that acts much more like a typical Mac App. This app is delivered in the installation directory, but could be moved elsewhere, such as your personal Applications directory [and initiated with a click]. * Generalized utex package. * Improved help screen.