Cleanup gb scripts/add to inlretro2, add -k CLI option for rom size in kilobytes
- Allow specifying rom size in kilobytes via CLI, do related plumbing to keep Kb as internal representation w/o breaking support for also accepting size in megabits.
- Cleanup gb scripts (romonly/mbc1):
- remove unreachable code that was left around from their origin as nes scripts
- migrate process()'s to be table driven
- add support for gb in inlretro2.lua so they can be run from the CLI