Merge branch 'instrument-agent-logging' into instrument-agent
Added logging for container commands and heartbeat transitions.
Adding failure instrumentation for container stop and create. Tests of these would require vast amounts of work, and probably isn't worth the payoff right now.
Merge branch 'master' of github.com:soundcloud/harpoon into instrument-agent
Merge pull request #36 from soundcloud/instrument-agent

Instrument agent