Fix #68: iPad app crashes if WOTD popover visible when WOTD updates.
Fix #65: Don't clear badge if notification was not tapped.
Fix #66: Improved derived from/pertains to help text.
Fix #67: Attempt to address this problem. The iPhone rotation callbacks are never/not consistently called.
#64: Convert to use UIWebView for license. Further puttering to come.
#64: Don't forget UA copyright.
Derp. Popover would not display after the first time.
#65: Actually, we need the badge to clear whenever the user taps the app icon. Otherwise, they can clear the notifications in the Notification Center, but the badge will remain. Later, this will be improved by adding WOTD history to the app.