Minor update to Help display.

Fix for potential crash should iPhone gyroscope not be functioning correctly.

App metadata updates, no changes to code.

App meta data changes.  No changes to code.

A minor code fix to prevent a potential crash on startup.

Update to pitch and roll calibration bias logic.  Now when pitch or roll bias is in use, text is shown on the main screen to indicate this.

Bug fix for background color not changing for out of tolerance wheel values when sound is disabled.

Minor change to van pitch and roll logic.