maintenance of notmuch ruby bindings

[David Bremner]

Dear Ali;

Looking at the commit history, I noticed you haven't worked very much on
the notmuch ruby bindings in the last couple years.  That could be
because notmuch needs to be done, but if you've lost interest, maybe we
should pass on the torch to someone else?  I think Felipe, in copy,
would be willing to take that on. At the moment I guess his notmuch-mua
is the main consumer. Of course if your still willing/able, that's fine
too.

d