Http.Entity: added class
Http.StaticEntity: added class
Error: added Http.HttpError
Http.Request: not responsible for responding anymore
Http.Server: now using entities which take over responsibility for responding
Http.SessionProvider: adapted the new entity-interface
example.vala: now using the new entity interface
README.md: fixed the example-program
README.md: removed deprecated descriptions
Http.Entity: added method send_bytes
Http.FileEntity: added class
Http.StaticEntity: fixed missing content-type header
Http.FileEntity: fixed missing content-type header
Http.Entity: made handle_request-method protected
Http.Entity: made send_default_headers-method virtual
Http.Entity: made status_sent and headers_sent protected
Http.Entity: default headers are now automatically sent
Http.Entity: made io_stream accessible by child-classes
Http.Entity: fixed error
Http.ChunkedEntity: added class