Missed a couple of files where message_publish is in an ifdef __APPLE__
section. But I decided to put message_type.h back in message_proto.h
because taking it out would affect a lot of user code.
Adds to #14.
Changed all header file once include variables to follow the same naming
convention and not start with any underscores. Also deleted old
incorrect copyright notices. Also removed $Id: tags from all files.
Fixes#14. Fixes#22.