Bannerless Tableau Shields

This OSP introduces a number of dynamically retextured shield- including Native's norman shields which have not seen the light of day in ages. Compared to the original tableau shields, these often feature designs in the foreground instead of merely featuring whatever inappropriate banner the troop might field. The design is semi-randomized by modulating the banner offset for heroes, but a presentation is included to assign a fixed design for the player character & loyal companions. The goal of this project is, I suppose, to add variety without creating duplicates of item entries in troop inventories so as to not unbalance item loot ratios or merchandise quantities. Changes should be made to module_items, tableaus, scripts, meshes, and optionally constants and presentations.