Minor mobile changes:
- Rename: "Featured Hikes and Routes" to "Featured Routes"
- Swipe behavior to disable GPS, disabled again for being annoying
Loops officially support Mountain Biking as an activity
and officially will not support Exercise as an activity
- data loading doc updated to reflect this new "mtnbike" field and its incorporation into routing
- routewaypoints() endpoint outputs mountainbike and not exercise
- Contributor UI files updated to no longer support Exercise activity