Added compass

- New Compass device service
- Separate Compass heading view
- No more "main.html" as each function has it's own view
- Other stuff
Improving Panorama

- Disabled accelerometer and heading pages...just focusing on Panorama
- Found a 360degree image which works much better (shouldn't need to restrict panning, though I'd like to figure that out.)
- Added an HUD in the lower right to indicate heading.