brushlib: Code for migrating to JSON for brush settings/input defintion
brushlib: Code for migrating to JSON for brush settings/input defintion

Note: disregards internationalization.

b3sigma/libmypaint,achadwick/libmypaint,b3sigma/libmypaint,b3sigma/libmypaint,achadwick/libmypaint,achadwick/libmypaint,achadwick/libmypaint