We don't necessarily *need* to maintain release notes in the
.metainfo.xml file, but for my local test package builds, it would be
better to have actual information than to leave in the dummy text. (The
duplicate empty versions cause it to fail validation.)
I had to make a number of assumptions here, like what the ID and
metainfo.xml license should be, whether to include the releases, etc. I
think it will be easier to talk about them in the pull request, though,
as then I'll be able to highlight the relevant lines for each point.
