UIButton Extension and SPM Support

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Added

• Alpha properties to UIImage extension along with unit tests.
  • Added by Christian Noon.
• Condition to UIImageView test to verify active request receipt is reset.
  • Added by Jorge Mario Orjuela Gutierrez in Pull Request
    #62.
• UIButton extension supporting remote image downloads.
  • Added by Jorge Mario Orjuela Gutierrez in Pull Request
    #63.
• Tests verifying Accept header is set properly for button image downloads.
  • Added by Christian Noon.
• UIButton extension tests around cancelling and restarting image downloads.
  • Added by Christian Noon.
• iOS 9.2 devices to the travis yaml device matrix.
  • Added by Christian Noon.
• Carthage/Build ignore flag to the .gitignore file to match Alamofire.
  • Added by Lars Anderson in Pull Request
    #71.
• Package.swift file to support Swift Package Manager (SPM).
  • Added by Christian Noon.

Updated

• UIImage scaling now uses af_isOpaque property where applicable.
  • Updated by Christian Noon in Regards to Issue
    #65.
• Refactored UIButton extension and tests to more closely follow coding standards.
  • Updated by Christian Noon.
• Simplified UIImageView tests replacing KVO by overriding the image property.
  • Updated by Christian Noon.
• Excluded the UIButton extension from osx and watchOS targets in podspec.
  • Updated by Christian Noon.
• Copyright headers to include 2016! 🎉🎉🎉
  • Updated by Christian Noon.
• The default parameters in AutoPurgingImageCache initializer with correct MB values.
  • Updated by Christian Noon.
• Several UIImageView APIs to public ACL to allow for better reuse.
  • Updated by Christian Noon.
• Alamofire submodule to 3.1.5 release.
  • Updated by Christian Noon.