fix "limit" and "skip" logic in io (still not very good, though) darcs-hash:20070722022442-5007d-00465e7c315db8a9bbde3dce5dd75a5a0a77f258.gz
allow a digest in Stream darcs-hash:20070708225033-5007d-a757b5725305d335ef78660467655225db9d66f2.gz
massive bugfixes in stream library darcs-hash:20070705214742-5007d-aff4d4553eaa6e3ad99a416d108cf513a00d6801.gz
massive rewrite of io library darcs-hash:20070705042342-5007d-b1d4446207cc88f406dbb360a11c31cd2e7fcdb4.gz