Update to V1.1

I've made a small update to DRUG WARS so that it will work on Agon Quark MOS/VDP Version 1.04 RC2, BBC BASIC (Agon) Version 1.06 by taking advantage of support for legacy screen modes. 

Although this is still a release candidate, I believe that new Agon Light boards and the Agon8 Console are shipping with this version of the firmware already.

1.04 adds lots of very exciting new features and a significant upgrade in graphics features but for now all I'm doing is taking advantage of support for legacy modes  so that DRUG WARS is not broken by the new screen modes.

I heard you like retro so I put a retro in your retro...