Swift 3/Xcode 8 compatibility

[Maximelc]

Hello,

I've just added a swift 3/Xcode 8 compatibility for my personal use and i think it could help others peoples :)

I edited the file named project.rb but at this moment the bundle identifier is not auto generated.

The Podfile contain the update for copying the acknowledgements.plist to the Settings.bundle directory.

My modifications are visible here https://github.com/Maximelc/liftoffConfig

Thanks

[gfontenot]

Any chance you can open a PR against this repo with your changes? I'm definitely interested in getting this stuff updated.