CLI mode for easy metadata retreival

When I want to get JSON metadata for a given doi I find myself doing:

```
curl -s -L \
  -H "Accept: application/vnd.citationstyles.csl+json" \
  "https://dx.doi.org/${DOI}" | jq .
```

...in a shell script. Would extending this package to include a mini convenience cli to do this (and other things?) be appropriate?