Cython 0.19 disables assignment of `char *` to `str`
Merge pull request #340 from minrk/c19

Cython 0.19 will disable assignment of `char *` to `str`

closes #339
fix IPC_PATH_MAX_LEN typo
Merge remote-tracking branch 'minrk/master'
remove unnecessary code
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
Merge remote-tracking branch 'minrk/master'
Fixed licencese.
Used _check_rc.