cc-by license for delphi-specific data
cc-by license for delphi-specific data

```
Any data which is produced novelly by Delphi and is intentionally and 
openly
surfaced by Delphi through this API is hereby licensed CC-BY.
```

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