This reverts commit 8c1c6f1bb1
as part of #53. We really do want to keep old metadata around
for the moment, both for old KSP versions and so poeple of the future
can choose to install older versions if they wish.
Unless I've missed something important here. Let me know if I have.
Our JSON engine wants to output the fields in a different order. This update means the netkan scripts don't constantly tell me things have changed when they haven't.