Napalm-logs

Pluggable listener: https://github.com/napalm-automation/napalm-logs/pull/79 thanks to loverend

- listem also to TCP: https://github.com/napalm-automation/napalm-logs/pull/74
- zmq listen on IPv6: https://github.com/napalm-automation/napalm-logs/pull/73
- clean exit on Ctrl-C: https://github.com/napalm-automation/napalm-logs/pull/75

Improved performances: https://github.com/napalm-automation/napalm-logs/pull/60
Added Kafka transport: https://github.com/napalm-automation/napalm-logs/pull/68
Allow multiple whitspaces inside the regex: https://github.com/napalm-automation/napalm-logs/pull/70

First beta release:

- fixed publisher issue: dedicated process for publishing
- added enhanced security mechanism
- security can be optional, however not recommended
- replaced Pipe with zmq IPC