Proposed 2nd draft of a modified item_weapon_masterwork, mostly to work with the BLUNT issue determined by Wrex;

gameplay wise main effect should be to make the Club and Polehammer (orc) and Jitte (elf) much more effective, but I applied the changes as best I could across the whole file for consistency. Also tweaks some of the edge weapons that come into play in Orc Fortress (tomahawks, keris pairs, serrated scimitars, standard katana) and makes major changes to a couple weapons that were really strange (flamberge, katara).