v4.0.0 - Release Candidate 2

Breaking Changes

• Before middleware has been removed, so no more pre function.
  • If you used pre middleware for url parsing, use the new urlResolver property instead.
• crossOrigin must now be a string if specified.
• Resource.LOAD_TYPE enum replaced with Load Strategies.
  • For example, loadType: Resource.LOAD_TYPE.IMAGE is now strategy: Loader.ImageLoadStrategy.
• Resource.XHR_RESPONSE_TYPE enum replaced with XhrLoadStrategy.ResponseType.
  • For example, xhrType: Resource.XHR_RESPONSE_TYPE.DOCUMENT is now xhrType: Loader.XhrLoadStrategy.ResponseType.Document.
• Overloads for the add function have been simplified.
  • The removed overloads were not widely used. See the docs for what is now valid.