Stop Details view Stop Info link highlight

The stop view now shows a coach mark (rectangular highlight basically) near the top to indicate where the stop info link will be. This uses the WSCoachMarks library.
![stopinfo-coachmark](https://f.cloud.github.com/assets/354123/1948890/de5334a8-80c2-11e3-83b9-1ec9ee682fc6.png)