Added most of the plist-based category list functionality
Work in progress commit - category add and edit almost complete
Category add and edit complete
Work in progress commit - start of project time reporting.
Work in progress commit - started the groundwork on the time reporting
Work in progress commit - updated tab bar appearance behavior to improve visibility
Work in progress commit - completed first wave of tab bar appearence updates
Wired the time reports and date selection view controllers
Recoded categories functionality from plist-based to Core Data.  This is the first working version released to TestFlight.
Work in progress commit - completed much of the new log entry pair code in the duty status view controller - the app runs to initial state but needs to be tested from there.