update DESIGN document, put skeleton code in place

we can write to ctl; thanks sigrid :)

trying to write to ctl file

serve simple file directories over 9p

writerf(): write data to ramfile from serverside

playing with ramfs implemenatation

design notes on 9p directory structure

remove old files on build; fix fsread() a little bit; add options for different service models

first commit -- hello from 9p