#12 Extend Save as to include a file option of .CSV

[John Bibby]

This would enable there to be a human readable format of the saved show that could be used in the event of a PC failure. "CSV" is usfull as it is both human readable, can be imported into EXCEL and can be easily read by most other programing languages. I do like belt and braces when I'm running a show and to have a written lighting plot gives me other option when things go wrong.