Log message:
Ran pkglint --autofix on the devel/ category. Most of the changes are
simple white-space issues like indentation and trailing spaces. The
others are cross-references for Makefile.common.

Log message:
Import matio-1.3.3

libmatio is an open-source library for reading/writing Matlab MAT files.  This
library is designed for use by programs/libraries that do not have access or
do not want to rely on Matlab's libmat shared library.