Use public ip and hostname for host lookup. Fixes infochimps-labs/ironfan#328
fix: Use public ip and hostname for host lookup.

Merge remote-tracking branch 'travis/cluster_kick'

This fix allows maps IP addresses to Ironfan names for display by the
cluster_ssh plugin. It addresses the following pull request:
https://github.com/infochimps-labs/ironfan/pull/329.
Version bump to 5.0.7
fix: yielding control of gemspec back to Jeweler
merging gerrit/master
Version bump to 5.0.8

Change-Id: Ie7e70c9b2fc7ed123f418f1aefdd55c147b72750
generating gemspec

Change-Id: I0506c08d25406f2d9aeb5ac80ce79667ce1f153a
merging gerrit/master

Change-Id: I5ca720380fa935b5ea33c7812d906b681ba2c034
merging gerrit/master
Merge pull request #341 from infochimps-labs/master

merge github/master into gerrit/master

merging in already-reviewed changes and version bumps