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>
Add Windows application icon

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>