let's trigger alerts if the error message changes - not only if the state changes.
e.g. we're in 'warning' for a day, something else fails, and the monitoring script appends the other error to the message. This should trigger another email, and update pagerduty with the new message text.
actually, use an empty dict if we can't parse the json.
Merge pull request #6 from manos/warn-on-message-state

let's trigger alerts if the error message changes - not only if the stat...
not unconditionally, though
Merge branch 'master' of github.com:krux/monitorlib into warn-on-message-state
this was broken.. forgot self)
collectd stops parsing stdout messages after it gets one it didn't understand, apparently. nice.