Merge pull request #5 from sjohnr/master

Destroy method was misspelled
Merge pull request #6 from sjohnr/master

ZreInterface should notify caller about remote peer, not self
Fixed problem with SHOUT caused by frames being destroyed after sending to first peer
Forgot to null content on destroy()
Fixed method signature of dup() method in codec
Merge pull request #7 from sjohnr/shout-fix

Fixed problem with SHOUT caused by frames being destroyed after sending to first peer
Merge pull request #8 from sjohnr/dup-fix

Fixed method signature of dup() method in codec