MUCH more readable background texture for all signs
use exact-to-pixel dimensions on all signs
move sign models to start of signs_lib where they can be seen
make homedecor's brass/iron signs-on-posts use them
adjust all textures accordingly
This also removes the pipe as line separator, and uses real
newlines instead.
To be compatible with older signs, those older signs are *NOT*
updated, and still use the old line handling code. In order to
take advantage of the new UI, old signs will have to be
replaced. This is an unfortunate drawback that cannot be
fixed.
Newly-placed signs will have the new features right away.
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
