update to google analytics 3.07
update to testflight 3.0.2
improve analytic tracking

* fix bug where experimental regions on/off status was recorded
incorrectly depending on users response to prompt
* simplified tracking
* added new tracking points
Merge pull request #306 from bbodenmiller/tf

update to testflight 3.0.2
Merge pull request #307 from bbodenmiller/ga

updated google analytics library & improved analytic tracking
Updated documentation
Fix custom API URL crash
Merge pull request #314 from caitbonnar/custom-api-fix

Fix custom API URL crash
Fix type incompatibility error
Clarify release note description
Update UX of pressing tab bar map button when already active
Update analytics label to match convention
Fix UX bug with current location and returning to top level map view

  - Bug was that tapping "Map" tab bar button, when inside a nested view
  (e.g., stop information), was firing off the re-center. Re-center
  should only occur when already on the top-level map view, not in any
  of its nested views.
Merge pull request #316 from licyeus/current-location-ux-tweak

Update UX of pressing tab bar map button when already active
Update contributing guidelines to incorporate ICLA
Merge pull request #312 from caitbonnar/contributing

Updated documentation about PRs
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