Create and view performances

This feature turned out to be several:
*Create a performance
*View a performance
*View the date create and by whom
*Add multiple customers and multiple partners to a performance
*View all customers and partners associated with a performance
*View a list of all performances by customer

@ChristopherThorsen - please take a look
While it's unlikely that two contracts have the same title, it's possible that they will, so for that reason I won't put a constraint on it.  But you've reminded me that I should have one on contract number which is now added.