Api metrics

Metrics can be accessed through the API like so

  http://adslabs.org/adsabs/api/metrics/?q=author:"Kurtz,+M"&filter=property:refereed&dev_key=abc123

Returned information will contain the 'meta' section (returned by the actual search, that yielded the bibcodes), a 'results' section, containing the metrics values, and a 'help' section, giving some information on how to interpret certain fields.