Vsphere guest

Results in data like:

```
2014/10/28 14:40:12 info: main.go:258: put vsphere.guest.mem.total 1414521611 1073741824 host=ny-vsphere02 guest=or-man01
2014/10/28 14:40:12 info: main.go:258: put vsphere.guest.num_cpu 1414521611 1 host=ny-vsphere02 guest=or-man01
2014/10/28 14:40:12 info: main.go:258: put vsphere.guest.mem.ballooned 1414521611 0 guest=or-man01 host=ny-vsphere02
2014/10/28 14:40:12 info: main.go:258: put vsphere.guest.mem.used 1414521611 182452224 host=ny-vsphere02 guest=or-man01
2014/10/28 14:40:12 info: main.go:258: put vsphere.guest.mem.host 1414521611 1111490560 host=ny-vsphere02 guest=or-man01
2014/10/28 14:40:12 info: main.go:258: put vsphere.guest.cpu 1414521611 0 host=ny-vsphere02 guest=or-man01
2014/10/28 14:40:12 info: main.go:258: put vsphere.guest.mem.free 1414521611 891289600 host=ny-vsphere02 guest=or-man01
2014/10/28 14:40:12 info: main.go:258: put vsphere.guest.mem.percent_free 1414521611 83.0078125 guest=or-man01 host=ny-vsphere02
```