Issues57 - groundwork for monitoring 

This is just some of the groundwork for a new set of methods to manage and view monitoring information.  
Currently "sl monitor status" will just show you the SERVICE_PING results for each server, and the last date it was checked.

![screen shot 2014-10-29 at 2 59 35 pm](https://cloud.githubusercontent.com/assets/7408017/4833618/2e76f466-5fa6-11e4-8c82-9d2b98fd3394.png)


I wanted to get this pull request in early incase anyone has any architecture concerns.
Can't there be multiple monitors per guest/hardware?