Move walk triangle to the right side of the cell
Move walk triangle to the right side of the cell

Fixes #901 - Tweak design of OBAWalkableCell

OneBusAway/onebusaway-iphone,ualch9/onebusaway-iphone,OneBusAway/onebusaway-iphone,ualch9/onebusaway-iphone,ualch9/onebusaway-iphone,cathy810218/onebusaway-iphone,themonki/onebusaway-iphone,themonki/onebusaway-iphone,OneBusAway/onebusaway-iphone,themonki/onebusaway-iphone,cathy810218/onebusaway-iphone,ualch9/onebusaway-iphone,cathy810218/onebusaway-iphone,OneBusAway/onebusaway-iphone,themonki/onebusaway-iphone,OneBusAway/onebusaway-iphone,ualch9/onebusaway-iphone,cathy810218/onebusaway-iphone,themonki/onebusaway-iphone