Bitopian/Bitopia

sklonowany z mizusato/KumaChan

mizusato 78e353b3eb Std.Source		5 lat temu
..
Array.k	f0272c8424 fix plus operator	5 lat temu
Future.k	763e9c7a91 fix, add test for Std.Map and Std.Set	5 lat temu
Map.k	44d897f435 copy operator on Std.Map and Std.Set, test for Std.Property	5 lat temu
Property.k	44d897f435 copy operator on Std.Map and Std.Set, test for Std.Property	5 lat temu
Set.k	44d897f435 copy operator on Std.Map and Std.Set, test for Std.Property	5 lat temu
Source.k	78e353b3eb Std.Source	5 lat temu
Stream.k	763e9c7a91 fix, add test for Std.Map and Std.Set	5 lat temu