Some examples of Set use

Not very many of the ``Examples'' sections in Appendix give explicit examples of using the commands with Sets. This is because for the most part the commands are invoked in exactly the same way for data with Set headers as for data without them, but the programs take account of the grouping if there are Set present and the USESET parameter is true. Below however are a some examples of how you can use the Set handling commands and other CCDPACK applications to take advantage of these abilities.