Reject obvious attempts to drag archives to 0desktop
Reject obvious attempts to drag archives to 0desktop

People keep trying to drag .exe, .tar.bz2, etc archives to 0desktop.
Reject URLs ending in these strings with a more helpful error message
(rather than downloading them and complaining that it's not XML).

DarkGreising/0install,bhilton/0install,bhilton/0install,gasche/0install,afb/0install,dabrahams/0install,pombreda/0install,gasche/0install,timdiels/zeroinstall,bartbes/0install,dabrahams/0install,timdiels/0install,dabrahams/zeroinstall,afb/0install,fdopen/0install,dbenamy/0install,0install/0install,dabrahams/zeroinstall,dabrahams/0install,dabrahams/zeroinstall,fdopen/0install,HoMeCracKeR/0install,timdiels/0install,dbenamy/0install,gfxmonk/0install,HoMeCracKeR/0install,HoMeCracKeR/0install,0install/0install,timdiels/0install,gfxmonk/0install,michel-slm/0install,jaychoo/0install,0install/0install,timdiels/zeroinstall,bartbes/0install,afb/0install,pombreda/0install,bastianeicher/0install,michel-slm/0install,pombreda/0install,jaychoo/0install,bhilton/0install,fdopen/0install,michel-slm/0install,timdiels/zeroinstall,jaychoo/0install,dbenamy/0install,gasche/0install,bastianeicher/0install,DarkGreising/0install,timdiels/0install,bartbes/0install,gfxmonk/0install,bastianeicher/0install,gasche/0install,DarkGreising/0install,afb/0install