Revision 592

reworked the asyncio some and completed it. parallel and serial uses it now. disk.c is a likely candidate for the future, but there are some problems with disk.c that we will have to look into first. parallel and serial works better, they do not hang the session, but are still yerky at large chunks... possibly we could split the chunks, but the terminal server does not seem to like partial transfers, i've tried some variations.. :) fns->write() could be split in smaller pieces, but what should the thresholds be.