Detective tweaks, now with 100% less merge conflicts!

Adds a new grey detective uniform. Sprites by myself.
Adds a detective's flask, and a standard flask for mapmakers (@Metacide, this means you). Also standardizes flask names. Sprites from Bay.
Removes the tie from the brown detective trenchcoat, and adds it to his cabinet.
Makes the leather satchel the default detective satchel, and makes lace-up shoes the default detective footwear.
Makes the detective spawn with sunglasses.
Makes the detective spawn with a telescopic baton, as an alternative to using his gun to take down a target.
Makes the Forensic Scanner weight class 2 (instead of weight class 3), allowing it to fit into a pocket.
Removes the the virtually unused evidence bags from the detective's spawning gear (a box of them are still in his office, however).

Please merge this quickly, as I don't want to have to go through re-adding all this stuff again.