Disbaled code that would try to get sounding rockets above asteroids.
gitignore: RP0.userprefs
Boosted passive antenna on octo core.

Previously it sucked more than the stayputnik.
Disable `rd` post-build-event.

This let's us build on Linux and systems that don't have `rd` installed.
But I've no idea what `rd` is supposed to do, so I'm submitting this as
a pull-request. @NathanKell, halp!
RP0.csproj: We now use `rm` to remove build objects.

I still think this is a terrible idea, since it's requiring that
developers have extra commands on their system.

For #39.