Re-work kibana ports:
Changes:
- Deprecate kibana43 and kibana44 as they're no longer being maintained. See kibana42 deprecation for details: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208494
- Change PORTVERSION to DISTVERSION to enable kibana50-devel support
- Explicitly ask for node4>=4.4.7 dependency for kibana45 as that's the version being shipped in the binary distribution
- Introduce kibana50-devel - a development version of the kibana
Known issues:
- There's no elasticsearch 5.0 version available in the ports yet, but kibana50-devel can be used to connect either to elasticsearch running on other machine or deployed manually