Send start, stop, and update commands to the Pebble
Send distance traveled to Pebble with update commands.
Add 500ms throttle to Pebble messages.
Merge pull request #36 from mojotech/fcanas/pebble

Send start, stop, and update commands to the Pebble
fixed white space
fixed unit string in distance formatter
set setMinimumFractionDigits in distance formatter
implemented distance formatter
created BehaviorFollower class
implemented follower in run view controller
breakout edgePadding calculation