- Use DiagDirection instead of plain int for the orientation of the depot graphics
- Rename the associated data tables with sprites to something more meaningful
by enums. There remains work in gfx.c to move the "transparency" and
"recolor" bits around to make space for more sprites. However, 2800
additional sprites can now be loaded. There also remains cleanup and
Doxygen work on many of the header files.
rubidium