Here's a new console archiver.

Except for completely async i/o (there're 5 threads atm: scanning,reading,writing,(de)compression,stats)
there's nothing special, and the only codec is ppmd_sh8, which is not very fast.

But at least its a real multi-file archiver, with full unicode support, and its able to compress
a directory tree losslessly - ie when we create an archive, extract a copy of data from it,
then archive it again - the archive copies are (supposed to be) identical.

Please test it and find me some bugs :)