Sample App Major Section: Routing

[msmollin]

• [x] Dropping pins with tap (https://github.com/mapzen/android/issues/487)
• [x] Getting driving route (https://github.com/mapzen/android/issues/488)
• [x] Drawing route (https://github.com/mapzen/android/issues/488)
• [x] Multi-point routing (https://github.com/mapzen/android/issues/488)
• [ ] Showing list of directions
• [ ] Clear Map
• [ ] Voiced Turn-by-turn
• V1: Just discuss in info panel
• V2: Actual implementation sample??