Merge pull request #127 from sappo/master

 extended zyre_event with a send API
Handles multi-part messages on SHOUT and WHISPER

- added a "msg" field type to the message codec
Merge pull request #129 from hintjens/master

Handles multi-part messages on SHOUT and WHISPER
Some internal name fixes
Merge pull request #130 from hintjens/master

Some internal name fixes
easier api for sending shouts and whispers