Tulimshar Sewer Warp fix
Modified NPCs scripts for sewer entrances. Fixed sewer_west
Small formatting, naming and position fixups on the sewer warp scripts.

- The Eastern entrance wasn't directly on the entrance tile
- Indentation was too much for some lines
- The Labels in all three scripts were named L_SewerNorth, renaming to L_Sewer
- Put the Label L_Close directly in the menu instead of below
Run 'make maps' for map changes and update submodule pointer.