Merge pull request #342 from felipecruz/master

remove unused code in cffi core
close zmq_msg_data after copying it's inner content
Merge pull request #343 from felipecruz/fix/close_zmq_message_after_recv

close zmq_msg after copying its content

fixes memory leak
remove ctypes_configure code since we can fetch

all constants with CFFI.
Merge pull request #345 from felipecruz/feature/remove_ctypes_configure

remove ctypes_configure and use CFFI to fetch constants

closes #344
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