[PATCH 4 of 8] opener: add read & write utility methods

[Dirkjan Ochtman]

On Mon, Dec 27, 2010 at 12:31, Nicolas Dumazet <nicdumz at gmail.com> wrote:
> Adrian, do we have alternatives here?
> If you can come up with an alternate patch or suggestion that ensures
> that things just work (tm) for PyPy, I'd gladly hear it.

Adrian seems to want to use utility functions (that take an opener) in
util.py instead of methods on opener classes. It seems mostly a matter
of taste, I haven't seen any convincing arguments either way.

Cheers,

Dirkjan