Be explicit about valid repo_urls
Be explicit about valid repo_urls

dajose/cookiecutter,michaeljoseph/cookiecutter,pjbull/cookiecutter,ramiroluz/cookiecutter,audreyr/cookiecutter,luzfcb/cookiecutter,hackebrot/cookiecutter,Springerle/cookiecutter,michaeljoseph/cookiecutter,ramiroluz/cookiecutter,willingc/cookiecutter,cguardia/cookiecutter,terryjbates/cookiecutter,cguardia/cookiecutter,audreyr/cookiecutter,terryjbates/cookiecutter,stevepiercy/cookiecutter,dajose/cookiecutter,pjbull/cookiecutter,luzfcb/cookiecutter,Springerle/cookiecutter,willingc/cookiecutter,stevepiercy/cookiecutter,hackebrot/cookiecutter