Added the AGM fuel system for some objects

Added the AGM fuel system for:
B_Slingload_01_Fuel_F (Container for the Huron)
Land_MetalBarrel_F
CargoNet_01_barrels_F
![2014-12-02_00001](https://cloud.githubusercontent.com/assets/7825979/5268510/5fa3d990-7a5a-11e4-9592-4b38a0467e4f.jpg)