Added better look for oblique sloped icons.
Added packet handler; many slope changes to accomodate new slope selection method.
Version update.
Debugged lighting; added depth-sensitive face ambient occlusion.
Alter recipes for slope and barrier.  Register new slope types.
Add hay bale as rotatable block; should handle any I missed as well.
Field, method or format changes.
Clean up loose ends with regards to lighting.  Obtain inventory icons using built-in methods.