Log message:
Removing python26. EOL'd quite some ago and discussed a couple times on
tech-pkg@ and pkgsrc-users@.

Log message:
Import py33-singledispatch-3.4.0.3 as devel/py-singledispatch,
packaged for wip by jonthn.

Expose a mechanism in the functools standard library module from
Python 3.4 to provides a simple form of generic programming known
as single-dispatch generic functions.