Replace current instruction with "Recalculating" view on recalculate.
Hide distance to destination while rerouting.
Merge pull request #283 from mapzen/chuck/hide-distance-while-recalculating

Hide distance while recalculating
Prevent jitter in map perspective when auto advancing.
Merge pull request #285 from mapzen/chuck/fix-map-perspective-on-auto-advance

Prevent jitter in map perspective when auto advancing.
allowing routing indicator to more while user is moving map
maintaining instruction index while paging is off
keep the routing party going even in background ;)
fixing merge issue