Merge Flying Batteries: Will do for 0.9.1.
Merge old maps: Wow, thanks for the effort! I will add numbers of players. These maps already have overtime, the editor merely doesn't display it when number of players is 1. I'll leave the overtime values as they are. Will merge them into 0.9.1.
Multiplayer maps go into 0.9.1. I added player numbers and shortened some overtimes. I haven't built a Play Bridge 4p.
Duality will go into 0.9.1.
-- Simon