New 'Military Belt' for nuke ops.

Juggling around your backpack and a jetpack is a pain in the ass, so to help fix this issue without snowflaky jetpack+backpack code, this belt was made.  Right now, it has no restrictions on what can go in it (if it fits in box it will fit in this belt).  New sprites included.

Screenshot with belt here: http://i.imgur.com/Mza55fp.png

This doesn't add the belt to any lockers as Cheridan has plans to change it and I don't want to cause merge conflict headaches.