removing hardcoded list of repos and adding code to
removing hardcoded list of repos and adding code to

feed the container with data from a GoogleDocs spreadsheet.
But we keep a cache file locally as well just in case (and for versioning purposes)

(issue #1241)

googlefonts/fontbakery-dashboard,googlefonts/fontbakery-dashboard,googlefonts/fontbakery-dashboard,googlefonts/fontbakery-dashboard,googlefonts/fontbakery-dashboard