Cargo Overhaul: Phase 1

-Ported Bay's cargo computer category system

-Created a box containing six flashes

-Crates have been tweaked significantly. Crates have been reduced to single item types where possible, namely with expensive crates such as weapons and armor. The total number of crates has been increased by 28, new stuff includes chemical and tracking implants, and raw materials can also be bought from cargo for a significant number of points (subject to change)