Prevents announcing "You have arrived" twice

Does not announce destination when approaching final instruction. Waits until route is complete.
Report all distances as 0 at destination

Distance to next instruction and distance to destination should be 0 at final instruction.
Hides footer on arrival.
Adds style manifest files to .gitignore
Removes unused route icons.
Adds new destination icon.
Updates pager view at destination.
Fix destination icon test.
Remove unused import.
Merge pull request #300 from mapzen/chuck/route-destination-refinements

New and improved destination view in routing.