added set_spec to properties and fixed days back
added set_spec to properties and fixed days back

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