Remove dirs files.
Update debian/compat to 9.
Add support for multi-arch.
Update standards-version.
Let libpsmoveapi3-dev package get shlibs:Depends from libpsmoveapi3 instead of directly.
Add support for debug symbol packages, Qt.

This would be better as two patches, but I'm not sure if it's worth
the overhead to separate them.

Note that I added a Recommends: for libpsmoveapiqt3.  I'm not sure if
that is ideal, but I didn't want to make a separate -dev package just
for libpsmoveapiqt3, and Requires: was a bit limiting.
Merge pull request #85 from kdienes/debian-packaging

Debian packaging