out of date dependency for ubuntu 16.04 and later

[jymbob]

Hi there. Thanks for this tool.

When using the .deb here on Ubuntu 16.10 "Yakkety" I hit an unresolvable dependency. openjdk-7-jre has been replaced with openjdk-8-jre. Installing that, then running dpkg -i --ignore-deps=openjdk-7-jre bdsup2sub-5.1.2.deb appears to work, in that the app installs, runs and can open .sup files.

A quick rebuild of the deb would make this usable out of the box again.