Add tempbuf recipe.

;; Tempbuf-mode is a minor mode that enables buffers to get
;; automatically deleted in the background when it can be deduced that
;; they are no longer of any use.

Its master repo is at git://gitorious.org/tempbuf-mode/tempbuf-mode.git

I am just a happy user of this package, using it daily for a couple of years now.

I have had no communications with the package author.