Add a launch XIB file and wire it up so that iPhone 6 and 6 Plus devices get proper launch images and size support, fixes #321. Fix "Zoom in For Stops" label on iPhone 6/6 Plus off-center issue. Fixes #327.

Fix "Zoom in For Stops" label on iPhone 6/6 Plus off-center issue. Fixes #327
Code review feedback on issue #321

- Fix layout of the scope bar on the map view
- Fix layout of the info button on the results view.
Merge pull request #328 from aaronbrethorst/develop-/fix-321

iPhone 6/6 Plus/iOS 8 Fixes