A few more tool_armor items.

adds a new generic iuse function to pack and unpack folding/rolled/stowable items

new items:

folding poncho  - found near other ponchos, can be activated to fold for storage, uses packing function
emergency blanket - has been upgraded to a modern folding space blanket that uses the packing function
findable/craftable radiation monitor device which uses a specialized iuse function, found near geiger counters