Use system-defined display unit for distance walked.
Refactor xclock and fix z-ordering of the clock hands so they overlap properly.
Add configuration setting for hourly chime.
Overhaul pblview panel to include two configuration options: randomly generated data and heart rate visualization (thanks @kitroed!)
Bug fix for digital clock.
Fix bug with 12-hour time format.
Fix bug with calculating the fractional part of distance walked.
Added configuration settings for: background color, hands color, distance unit, and xclock display mode.
Added digital-only and analog-only xclock display modes.