Resprite of most items and wielded items

Added new helmets with item and on-dwarf sprites:
Sallet - alternative to Kettle Helmet, covers more than kettle, twice as expensive.
Bascinet with mail - another alternative to usual helmet and has mail coif inbuilt. Better cover than sallet, worse protection.
Bascinet visored - same as above, but more cover and more expensive. Still worse and cheaper than topfhelm.

Added all items from this mod to human races too. No sprites for them though.

Fixed shield layers covering right hand one handed weapons from this mod
Corrected a few sprites to be in match with pallete

Fix to some wieldable sprites

Added:
-Forthammer guns (changed sprites)
-Kettle and Topfhelm helms
-Coat of plates
-Left hand sprites for weapons