This commit introduces a new module called vr_os_facts.
This module aims to return the list of OSes avaiable avaiable to use to
boot servers.
Sample available here:
```
"vultr_os_facts": [
{
"arch": "i386",
"family": "ubuntu",
"id": 216,
"name": "Ubuntu 16.04 i386",
"windows": false
}
]
```
