(same colors as armchairs)
this necessitated a slight change to the existing model, it is now exactly
fit to pixels so that the new textures will align correctly.
Also, phased out the *lat1/lat2 textures used on the armchairs - redundant.
package the two together as a modpack so that regular homedecor users don't
see a functional change, but others can take signs_lib and use it as a
standalone mod.
also get rid of some *~ files
