docker-pkg Update

I went ahead and made a significant change to the docker-pkg project, which contains the source for building Docker images for building packages for various Linux distributions. I added some generic scripts to make it easier to build packages.

• make-deb.sh, included in Debian images, builds a .deb package for a source tarball.
• make-rpm.sh, included in Fedora images, builds a .rpm package for a source tarball.

These scripts require the source to follow some conventions, as documented. Note that the images can still be used without the scripts when different behavior is required.

For the first use of these generic scripts, I added .deb and .rpm packaging to hr, releasing version 0.2.0.0.