last things and fixes for some of the iSec reported issues

Inlcudes some of the fixes for issues reproted by iSec and the fix for unattended-upgrades that I was working on when iSec started the sec audit. Closes #439, #437, #435, #441 

Also adds
- the facistfirewall setting to torrc file so that the ports could also be restricted in the iptables rules. 
- Example network firewall rules
- xSendFile so that large files can be downloaded
Here is the ubuntu man page describing it https://help.ubuntu.com/12.04/serverguide/automatic-updates.html Between the .2.1 and .3 release I deleted the commented options we werent using and accidently deleted the line `Unattended-Upgrade::Allowed-Origins` instead of `Unattended-Upgrade::Origins-Pattern`