renamed logback config for tests
removed play.iteratee.extras dependency
removed ByteStream async handler
removed dockerRequestEnumerate and replaced with dockerRequestIteratee which takes a consumer iteratee to process response
added convenience methods to access chunk body
refactored to use consumer iteratees when calling streaming endpoints
added base64 encoding implementation
refactored to reflect latest refactorings and fixed tests
added customized json streaming parsers of play.extras.iteratees
added custom test case for docker.attach operations
added helpers needed by test cases