Build: Add Settings.bundle and script to update version

- Add Settings.bundle and update-settings-bundle.sh
  that can be used to update the Version in the
  settings bundle so it shows up in the iPhones
  settings area under iGCS.
Build: move update Settings.bundle version to build.sh

- Migrate functionality to update the version string
  in Settings.bundle to our build script.
Attribution: add correct license files for third party libs
UI: Add AboutViewController
Merge branch 'master' into igcs-114-attribution-file-view
Merge branch 'master' into igcs-114-attribution-file-view
Build: update build.sh to generate Acknowledgements

- Discarded plans for in app Acknowledgements for now.
  ran into multiple issue around UI at this time. For
  one info button overlay on map view is not very
  responsive to touches.

- Added credits.py 3rd-party script

- Acknowledgements.plist generated for Settings.bundle
  and can be seen by going to settings->iGCS in iOS.

- Excluded HockeySDK from Acknowledgements.plist since
  it won't ship to app store.
Update ATTRIBUTION.md
ATTRIBUTION: Fix Capitalization.
Merge pull request #125 from fightingwalrus/igcs-114-attribution-file-view

igcs 114 attribution file view