[Telepathy] otr - new branch in telepathy-gabble

[David Edmundson]

> There are lots of similarities between his code and mine, and it's
> expected since we probably both looked at how pidgin-otr does it. I
> think my branch is simpler and thus easier to get merged as a first
> step. More features can be added later.

Well, if we're going to spend time merging anything we should merge
the one that looks closer to having everything we actually need to do
this properly.

David