fontinfo.plist import/export v4. update for PR 215

see https://github.com/metapolator/metapolator/pull/215
I am not determining any fontinfo.plist for fonts without it. I think it should be noted in the UI that some fonts have fontinfo and some do not. The whole goal of this task was to allow the fontinfo.plist to be imported for each master and also exported again.