[aur-general] Exchanging glest with megaglest

Development on glest has been halted and due to that the megaglest fork has been started. I'd like to drop glest to AUR and move megaglest to community in its place. I feel this is the right thing to do since any player would want the more featureful and actively developed version. If nobody is going to hate me for it, I'm going to move it in 1-2 days. -- Sven-Hendrik