Icons, Tab Bar, More

- Added Experimental icons, launch images
- Tab bar now shows the number of classes today in a badge
- Added refresh control to TodayView for refreshing the table
- Cleaned up TODOs
- Fixed "Plain" button bug
- More stuff
Starting .50 Time support
Upcoming Row is smaller, Class Status better

- Upcoming classes have been made smaller, hence look better
- Classes are now shown "in progress" if they match the current class
(experimental)
- Added automatic text shrinking in UpcomingClassCell Slots