Move require for org-blog-buffer.
Refine our reduce handling

The insight was that we were already using expressions in cond that
all evaluated to what we wanted the new value of the accumulator to
be, and that the absence of a value for a particular key could be
expressed as the identity on wp, so everything could be moved into the
cond, much simplifying things.
Merge pull request #9 from mdorman/merge

A couple of small cleanups