[sensu-transport] use sensu-transport 0.0.7, should fix close() race.
Merge pull request #746 from portertech/sensu-transport

Use sensu-transport 0.0.7, should fix close() race.
beta version/iteration bump
[nested-sets] support nested handler sets (not deep)
Merge pull request #750 from portertech/nested-sets

Support nested handler sets (not deep)