PROPOSAL design doc for container supervision
Add note to rename Heartbeat type
Basic logging instrumentation and tests.
Gofmt fixes.
Add clarifying text for `status` file
Use `state` for structural data; `status` for enum
agent: Events() returns map, not slice

This makes a lot of things easier for the scheduler.
Added prometheus value checking.
scheduler: update to use new Events() return type
Merge branch 'master' of github.com:soundcloud/harpoon into instrument-agent-logging
agent: add mock server + client routes
Update libcontainer notes
Add lmctfy section to container systems doc
Removed extraneous debugging code.
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 pull request #34 from soundcloud/instrument-agent-logging

Instrument agent logging
Merge branch 'master' of github.com:soundcloud/harpoon into instrument-agent
Merge pull request #36 from soundcloud/instrument-agent

Instrument agent