Add Debian packaging scripts

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Add application icon and .desktop metadata

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Update Debian packaging for jammr 1.0.1 release

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Update Debian packaging for 1.0.2 release

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Update Debian packaging for 1.1.0 release

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Enable -lporttime for the Ubuntu package

This is a hack, we cannot modify debian/rules globally since it should
work for vanilla Debian.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Update Debian packaging for 1.2.0 release

Update dependencies on Qt5 and PortMIDI, as well as the changelog.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>