How to: Linking with an Application
Include `czmq.h` in your application and link with libczmq. Here is a typical gcc link command:

    gcc myapp.c -o myapp -lczmq -lzmq

Note: if you want to use the draft APIs you'll need to define `CZMQ_BUILD_DRAFT_API=1` 
and `ZMQ_BUILD_DRAFT_API=1` in order to unlock them. This handled automatically 
by platforms using pkg-config but not through cmake on Windows for example.