[ADD] gg_oni_cargo_x

[Christmas]

Map: gg_oni_cargo_x
Location: http://rapidshare.com/files/41283628...ni_cargo_x.bsp
Reason: Based off a portion of a level from the ps2 and PC game called ONI (airport cargo hangars), it provides a bit of nostalgia for the very few of you who might have played the game and gives a balanced feel with a moderate size for gg.