update change log for 13.0.1
clarify libzmq version check in CFFI backend
add notes PyPy and libzmq versions in README
raise ImportError if no libzmq can be found at all
Merge pull request #347 from minrk/check-libzmq-cffi

check libzmq version in CFFI backend

raises ImportError if libzmq can't be found or is too old.
fix messages when you try to run configure on PyPy

It doesn't do anything.
bump to 13.0.1
update description
back to dev
Python 3 fix: dict size changed in constants
13.0.2
13.0.2 changelog
tweak build checks

- avoids linking against libzmq when checking for sys/un.h
  when zmq is unspecified and unavailable.
- avoids creating temp files outside build dir with `has_function` checks.
Merge pull request #349 from minrk/checks

tweak build checks

- avoids linking against libzmq when checking for sys/un.h
 when zmq is unspecified and unavailable.
- avoids creating temp files outside build dir with `has_function` checks.
back to dev
don't use REQ/REP in devices docs

closes #351
Merge pull request #352 from minrk/reqrepdoc

don't use REQ/REP in devices docs
generate platform.hpp from 3.2.2
generate darwin platform.hpp from bundled zeromq
use log messages instead of print