Addvultrdocs

2nd round of changes. Need to add more specifics.

```
TODO:
# new VPS
# custom ISO
# select "upload later"
# wait for the VPS to startup
# go to the console
# Type: "dhcp"
# Type: "chain http://canhazip.com/script.txt"  
# Tweak the script.txt on your own server with your own pub key
```