Giving Directions

ie) ride the 'L' train for 3 stops and get off at X

ie) ride the 'L' train for 2 stops, transfer to the F train, ride it for X stops to Y

To Do:

Assume start/final stops are on the same line and...
- [x] Tell user what direction to ride the train (ie. towards "end of line" like "towards 8th Avenue"
- [x] Tell user how many stops

Then:
- [x] Tackle changing trains