Update copyright info and credits
Set up preferences menu skeleton
Add new timer window
Connect App Delegate to Window
Add VWTAppController object to Main XIB
Change wiring from old xib to MainMenu.xib
Fix sound selection popup button
Merge branch 'feature/refactor_ui' into develop
Wire up preferences sheet
Lay out preferences window
Set up notifications and fix bug

Set up notifications preferences and fixed a bug that would prevent the timer from stopping if the repeats checkbox was unchecked after the timer as started.
Update README
Hook up close button from prefs controller to App Controller
Code tidy & reset timer back to firing at 1s intervals
Merge branch 'feature/preferences' into develop
Bump version number
Merge branch 'release/v0.7'