I removed a bunch of useless(?) stuff in the debianTemplates
directory. And renamed some files. Seems that the dh_make template
stuff is pretty basic -- it just substitutes the string 'package' in a
filename with the name of the package.

I also modified the rules file -- among other things 'clean' required
'setup'. But setup was not built yet. The currently solution seems
like a bit of a hack, but does at least generate a package.

Also, I use dh_installdocs to install the installed-pkg-config instead
of copying it explicitly in the rules file. Added a compat file
(level 4), and a default changelog.

commented out the Depends line in the control file, because there is
currently only a -dev package.

To invoke the debianTemplate stuff I do:

dh_make -d -t /full/path/to/debianTemplate

The -d keeps dh_make from installing a bunch of useless stuff in the
debian directory, but it also makes it so that the copyright file does
not get created, even if you specify -c on the command-line. I think
that should be considered a bug.