fix sundry problems preventing integration

* fix invalid basal records with NaN and value === ''
  * added test to eliminate records with value equal to the empty string
* allow sunder-csv tool to read from stdin - useful for debugging system integration
* eliminate bad duplicate "config" keys in package.json
  * was preventing getting links to diasend, causing download to fail
  * tweaked request configuration in service of debugging, leaving it
    as-is because I think might prefer that style
Merge pull request #1 from tidepool-org/bewest/system-integration

fix sundry problems preventing integration