Rev. WebPortDB data model to include 'showRecentPatients'

commit bedf37009aae00f3e4096bd80970c085ff1d7e7e changed the WebPortalDB schema (adding User -> showRecentPatients) without revving the data model file. While OsiriX handles this situation (in N2ManagedDatabase), Apple documentation warns against the practice ( http://developer.apple.com/library/ios/#documentation/cocoa/Conceptual/CoreData/Articles/cdUsingMOM.html%23//apple_ref/doc/uid/TP40005190-SW9 ). This patch attempts to break-out the changes made in the commit into a new data model.