Adding a way to create PHP streams based on request objects
Keeping track of the last received response headers
Adding the ability to specify stream context parameters
Dispatching request.before_send before sending a request with the stream factory
Stream factory now returns a stream object. Can now set custom data on stream objects. Added readLine() method to stream objects
Adding feof() as an alias of isConsumed()
Adding close() method to stream objects
Fixing AbstractEntityBodyDecorator