Update to version 6 - Demo map + extra tweaks

-Added a demo map! Explore Stone's little corner of Space Britain (or what's left of it at least) and experiment with your punch/kick/sword timing.

-Added a black armor reskin add-on

-Added a custom hud w/berserk and deagle charge meters

-The deagle charge attack is now available by default

-Added crouching sprites

-Tweaked the micronuclear cloud effect to look chunkier

-Changed the thumper pickup sprite to differentiate it from the SSG better