Add libzmq version checking to installer
Fix typo
same but simpler
Merge pull request #15 from claws/add_version_checking

Add libzmq version checking to installer
Add CZMQ version check to installer
Merge pull request #17 from claws/add_czmq_version_checking

Add CZMQ version check to installer
Merge branch 'master' of https://github.com/zeromq/pyczmq into fix_typo
Merge pull request #16 from claws/fix_typo

Fix typo