Notifications v1.0

First instance of the notifications system. At the moment it updates every hour, and only checks for pos fuel less than 1000 blocks and non-online pos's. It will send the notifications to anyone that has inherited the pos_manager role.

Example of notifications overview
![screen shot 2014-12-11 at 03 55 04](https://cloud.githubusercontent.com/assets/1621438/5389033/c2d254bc-80ed-11e4-97ba-c28745795042.png)

Addresses #54