Compress CSV responses from the API
Compress CSV responses from the API

#210 added format=csv, but these responses are not currently compressed like JSON responses are.

I'd like to switch to CSV format in the R client, so compression is important to add here.
cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata