[issue1751] Fast BytesIO implementation + misc changes

[Brett Cannon]

Brett Cannon <brett at python.org> added the comment:

Alexandre, you have until the end of the week to commit it or someone else 
will. =) I don't want this going in so close to the alphas, but it should 
go in almost immediately afterwards.

__________________________________
Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1751>
__________________________________