wip: inching toward a solution with robot.emit.
wip: refactor to classes underway. Checks and Help already complete. Summary up next. This modularity should make it much easier to have a Monitor class (or similar) that can be used by both the standard 'hubot canary incident/mon' commands AND by the http listeners.
wip: factor out Measurements class to handle basic display of summary info.
add support for GET /hubot/incident URLs. major rewrite using classes too. Close #12.
add support for POST method too. Close #12 for realz.
move robot.respond near top of exports.