Swift 3.0 Preview 4

This preview contains the following repositories:
https://github.com/apple/swift
https://github.com/apple/swift-clang
https://github.com/apple/swift-llbuild
https://github.com/apple/swift-llvm
https://github.com/apple/swift-corelibs-foundation
https://github.com/apple/swift-corelibs-xctest
https://github.com/apple/swift-package-manager
https://github.com/apple/swift-cmark
https://github.com/apple/swift-integration-tests

This preview does not contain: swift-corelib-libdispatch

Building this preview on Mac OS requires Xcode 8 beta 4.