Allow health export action

[abh]

It'd be spiffy to have a way to make a custom action that exports health status. For example an action could be made to export data to cube – http://square.github.com/cube/

Another example would be to push in real time alerts to email or XMPP or IRC or ...

I realize an external script could do this, too, but you have so much framework already in place it seems silly to duplicate that. Also an external thing couldn't as easily be triggered whenever a result comes back from the check action.

[jeffsu]

btw, I just refactored a lot of the server code where you can see a decent live graph. I also just integrated forever. There's a sample in examples/simple.yml. The next step is to allow for plugins.