Direction list ordering

DirectionsModel now returns the list of directions in order rather than
a random jumble
Merge branch 'master' of https://github.com/sashalives/busbike

Conflicts:
	Bike&Bus/Bike&Bus/DirectionPathViewController.m
Merge branch 'master' of https://github.com/sashalives/busbike

Conflicts:
	Bike&Bus/Bike&Bus/DirectionPathViewController.m