Add the ability to do a non-blocking send with multi-part messages

I added a new variant constructor to snd_option rather than changing ?opt
to take a list in order to avoid breaking existing code.
Merge pull request #9 from hcarty/add-more-no-block

Add the ability to do a non-blocking send with multi-part messages
Update bindings to zmq 3.2
Code is compiling against version 3.2. Need to extend the unittest
Remove autogenerated files
Extend unittests to test option setters and getter and the proxy implementation
Fix interface, and do come cleanup in the cstub
Update meta file to have correct version
Remove META file, as its autogenerated and bump version in the oases control file
Extend tests to provoke type errors
Fix type signature on functions operating on subtypes
Remove redundant test
Ignore autogenerated META file
Match enumeration index between c stub and ocaml
Pull upstream changes
Remove yet another autogenerated file
Remove yet another autogenerated file
Merge branch 'master' of github.com:issuu/ocaml-zmq
Update dependencies in the readme file
Merge pull request #11 from issuu/master

Update bindings to ZMQ 3.2