Add zerocopy, might work
Merge pull request #223 from trevorbernard/master

Fix issue #81
Merge pull request #224 from mkoppanen/master

Issue zeromq#189, zerocopy
Fix issue #222 - Add ByteBuffer API for send and recv
Merge pull request #225 from trevorbernard/bytebuffer-api

Fix issue #222 - Add ByteBuffer API for send and recv