Add setup for flake8
Add setup for flake8

mehanig/scrapi,alexgarciac/scrapi,felliott/scrapi,erinspace/scrapi,ostwald/scrapi,CenterForOpenScience/scrapi,fabianvf/scrapi,erinspace/scrapi,fabianvf/scrapi,felliott/scrapi,jeffreyliu3230/scrapi,icereval/scrapi,CenterForOpenScience/scrapi,mehanig/scrapi