SW5906 light and dark

Arby26 made nice submission that for me had only one "problem" - I just dislike having two exactly same guns. But since he was kind enough to leave "ready to compile" source files, and K1CHWA made black version, I've decided to compile this little thingie, where in akimbo mode you have light gun in right hand and and dark gun in left.

Hopefully no problems will arise. My few minutes of running around and killing zombies showed none, but who knows...