FlightData: Waypoint labels for mission path displayed on flight map screen

Flight Data:
- Added static, non-draggable waypoint label markers to flight map fragment. 
Label markers are grey (disabled) to reduce distraction.

Added as reference so that when using the waypoint spinner on the action bar the operator can know where each waypoint actually is.

Before:
![screenshot_2013-10-14-15-20-10](https://f.cloud.github.com/assets/4014433/1328670/fb3390de-3506-11e3-9a77-b62b87f8d819.png)

After:
![screenshot_2013-10-14-15-21-40](https://f.cloud.github.com/assets/4014433/1328672/0a192c08-3507-11e3-95a7-2643b7c97570.png)