/core/response message will be kept as []byte and casted to string on Message() calls.
/core/response message serialization as status responseBody (with - for multiple lines) added
/core/response ByteMessage() added
/core/parser - will ignore empty message without an error (left overs). Will be greedy in line breaking selection from here on.
/core/parser - bug fixes showing up while writing the test cases
/core/parser_test additions (work in progress)