All works thanks Bob!
That makes it a bit simpler!
pi@raspberrypi ~ $ sudo apt-get install mediacenter20
Reading package lists... Done
Building dependency tree
Reading state information... Done
mediacenter20 is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 21 not upgraded.
PS. I just ran this from above, for those that want to make upgrading MC20 on Pi quicker.
wget -q "http://dist.jriver.com/mediacenter@jriver.com.gpg.key" -O- | sudo apt-key add -
sudo wget http://dist.jriver.com/latest/mediacenter/mediacenter20.list -O /etc/apt/sources.list.d/mediacenter20.list
sudo apt-get update
sudo apt-get install mediacenter20