Cleanip of NPCs and shaders. Added missing menus

Not missing per say - from base. Allows menus to work without base
assets, will be replaced with JKG versions soon.

Did the same for strings and shaders, did a quick pass over to remove
unused things from base shaders.
Merge branch 'master' of https://github.com/JKGDevs/JediKnightGalaxies