Distance Manager updated for demo - in progress
Still need distances, names of QR codes, and assistance with displaying distance
and path information
Updated distances and names of markers. Still working on the basic pathfinder
to allow skipping markers and still getting the achievement. Still need hooks
for display and achievement managers.
All functionality in place, though untested. New: Achievement award added, methods for Display manager to call added, stupid pathfinder added
Merge pull request #5 from SHenney/master

Pulling in Sarah's changes