Time since last system upgrade feature.

Reads pacman's log file and finds the time of the last full system upgrade. Helps me to keep my system from getting stale.

To enable the feature you'll need to add system_upgrade() to your config file.

![screenshot from 2013-05-10 00 00 41](https://f.cloud.github.com/assets/1390340/482629/d53ecb66-b89f-11e2-80ec-3582a2779699.png)