Adding tests for Printable and DebugPrintable
Including delegate credential in cURL representation
Fixing authentication challenge implementation to cancel after failed attempt
Update README.md
Exposing session and task properties
Making SessionDelegate private
Making TaskDelegate queue non-optional
Making ParameterEncoding queryComponents internal
Auditing use of self.
Keeping consistent order for upload/data/download checks
Adding missing check for automaticallyStartsRequests
automaticallyStartsRequests -> startRequestsImmediately
Making upload methods public
Change methods to use URLRequestConvertible instead of NSURLRequest argument
Fixing HTTPBin URLString
Revert "Making SessionDelegate private"

This reverts commit ec437a42342ccb60cd3eacb65eb918ad571505a8.
Making delegate classes internal
Fixing authentication
Adding Custom ParameterEncoding test
Renaming request -> URLRequest in tests