new HttpClient committer?

[Morgan Delagrange]

Hey Costin, hey Remy,

I'd like to join the HttpClient project.  I see a couple small changes I'd
like to make right now, and I may also add some JavaDocs as I explore the
library.

One comment: to a newbie such as myself, it's a little unclear what is
explicitly ties to WebDAV, and what is not.  We should definitely clarify
the JavaDocs before release time.  Also, for the WebDAV-specific stuff, we
should either remove it, or move it into its own package (probably the
latter).

- Morgan