Updates for Swift 4 and Xcode 9#25

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ZevEisenberg wants to merge 9 commits intodevelopfrom

feature/zeveisenberg/updates

Commits on Jan 23, 2018

Tweaks to make SwiftLint happy.
Zev Eisenberg
committed
Update to Swift 4.
Zev Eisenberg
committed
Update for Xcode 9.2.
Zev Eisenberg
committed
Build on Xcode 9.2.
Zev Eisenberg
committed
Capitalize Gemfile.
Zev Eisenberg
committed
Update CocoaPods.
Zev Eisenberg
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Use modern convention for specifying destination.
Zev Eisenberg
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Include only Swift files in source_files.
Zev Eisenberg
committed

Commits on Jan 24, 2018

Fix crash when gallery is dismissed while upates are pending.
Zev Eisenberg
committed