Version 2.4.0

• Added support for Upload Tags.
• Added support for Swift Package Manager.

Version 2.3.2

• Fixed transforms using the wrong base URL resulting in 404 responses.

Version 2.3.1

• Cancelling an upload is now also reflected on its associated progress object.
• Fixed a possible race condition when cancelling an upload operation right after it started.

Version 2.3

• Added support for background uploads (see "Enabling background upload support" in README.md for more information.)
• Improved upload progress reporting.
• Improved retry and cancellation logic in upload operations.
• Significantly improved performance of MD5 and Hmac calculations by relying on CommonCrypto.
• Removed CryptoSwift dependency.

Version 2.2.2

• Added filename property to Uploadable and default implementation for URL (addresses #19.)
• Improved reliability of MultipartUpload abort logic (addresses #18.)
• Removed unnecessary files from Copy Bundle Resources phase (addresses #17.)
• Updated CryptoSwift dependency to ~> 1.3 in Cartfile and podspec.

Version 2.2

• Added upload(using:options:queue:uploadProgress:completionHandler:) taking one or multiple Uploadable items as input to Client and deprecated multiPartUpload(...) and multiFileUpload(...).
• Added equivalent new upload functionality for Objective-C that allows uploads of one or several local NSURL or NSData.
• Client upload functions now return types based on protocols, such as Uploadable, DeferredAdd, Cancellable, Monitorizable or combinations of these.
• Added UploadOptions class that allows customizing the upload behavior in a much more fine-grained way.
• Added CustomStringConvertible conformance to most public classes using newly added helper Tools.describe(subject:only:except:).
• Added static defaults function to StorageOptions defaulting to StorageOptions(location: .S3, access: .private).
• Removed unused storage property from Client and marked init(apiKey:security:storage:) as deprecated.
• Exposed more API to Objective-C.
• Updated Alamofire dependency to ~> 4.9.
• Updated CryptoSwift dependency to ~> 1.0.
• Improved documentation.