Xcode 9 and Swift 4.0 Support

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Updated

• The Alamofire submodule to the 4.5.0 release along with all dependency requirements.
  • Updated by Christian Noon.
• Updated all project settings to Xcode 9 for support for Swift 3.1, 3.2, and 4.0.
  • Updated by Christian Noon.

Fixed

• Issues and typos throughout the README documentation and sample code and source code docstrings.
  • Fixed by Eric Horstmanshof, Martin Arista, and Wolfgang Lutz in Pull Requests #21, #24, and #25.