- Rename extra font dirs to match sizes (were off by a few px)
- Distribute colors per font, and resize default color textures
to match default font.
- Removed character size cache (was useless and just made things
more complex).
- Get line height from background color texture height.
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
