make HttpPortal a trait to allow for better documentation.
fix typo.
remove default values.
remove java source folders.
rename package handler to http.
parse and write headers.
add specific headers (content type and content length).
change requestprocessor from () => Props to Props.
fix initialization order.
fix problem with inner class actors instantiated via Props[]
fix typo.
add debug log for requests.
fix error in Method.normalize
name the actor with the request path and a request id.
actually forward the response to the original sender.