Change status text to match deviation color

Changes as described in #317. 
1. Changed the label color to be slightly darker green. 
2. Matched the deviation time color to the color of the minutes. Please take a look at the code and let me know if there is a better way of doing this. I don't like how hacky it feels. (Particularly with ```NSMakeRange```.)

Screenshot of changes below:
![Screenshot of Stop Details View with status colors changed](https://cloud.githubusercontent.com/assets/4627278/4568432/3b85a6ec-4f3a-11e4-84db-b2ea54ea0497.PNG)