[Python-3000] iostack and sock2

[tomer filiba]

hi all

some time ago i wrote this huge post about stackable IO and the
need for a new socket module. i've made some progress with
those, and i'd like to receive feedback.

* a working alpha version of the new socket module (sock2) is
available for testing and tweaking with at
http://sebulba.wikispaces.com/project+sock2

* i'm working on a version of iostack... but i don't expect to make
a public release until mid july. in the meanwhile, i started a wiki
page on my site for it (motivation, plans, design):
http://sebulba.wikispaces.com/project+iostack
with lots of pretty-formatted info. i remember people saying
that stating `read(n)` returns exactly `n` bytes is problematic,
can you elaborate?

btw, Guido said he'd review it, but he's too busy, and i'd like to
receive comments from other people as well. thanks.


-tomer