ODM2 Measurement Results DAO

[emiliom]

• See PR Python 3 compatiability fixes; measurement result example changes #230 (11/28/2018), based on measurement results in the Luquillo CZO ODM2 (ODM2 Admin) database. ODM2 measurement results DAO ("example").
• Issues arising from measurement results in that database came up in previous issues:
  • GetSiteinfo REST error for some LCZO sites.  #227
  • Completing Luquillo CZO WOFpy endpoint integration into CUAHSI WS #219
  • Adapting ODM2 timeseries DAO to Luquillo CZO ODM2 PostgreSQL DB #73