Update RemoteTech-1.5.1.ckan

The original file appears to have been auto-generated from the KerbalStuff entry, which has some limitations (and which contains one mistake, the extra "v" in the version number).

I'm also putting together a list of suggested mods and a list of optional config files, but those can both be supported later.

Question for @pjf: when I set `github.releases = true`, will that look at only full releases, or pre-releases as well? We probably don't want people downloading those unless they know what they're getting into.

Also, am I correct in thinking we'll need a new one of these files every time we put out a release?