trim to original (ca 2015) authors
trim to original (ca 2015) authors

- additional authors, including aaron and everyone else who contributed 
to covidcast, to appear in forthcoming manuscript

cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata