Nicer icon

Changed IcoMoon icon info to info-2 in com_admin sysinfo

![old](https://cloud.githubusercontent.com/assets/1738811/3555107/a6ed8ec6-0913-11e4-9b4e-eb7d27a73021.png)

vs.

![new](https://cloud.githubusercontent.com/assets/1738811/3555109/a6ffe670-0913-11e4-8bf1-90388f891077.png)