pandoc 1.13.1

Closes #32492.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
pandoc: fails with clang to match ghc
pandoc: update 1.13.1 bottle.
pandoc-citeproc: fails with clang on Lion
Open MPI: version 1.8.2.
open-mpi: add 1.8.2 bottle.