Set up UserManagementBean with necessary methods for saving edits to users.
Merge branch 'maven' of https://github.com/mcbeckler/OpenSale.git into maven
UserManagementBean now operates on users by Id rather than Username (to make absolutely sure we get the right user, since Id is always always unique). Refactored some of the giant-stack-of-catch blocks into one private helper method.
Merge branch 'maven' of https://github.com/mcbeckler/OpenSale.git into maven