Benchmark check-in for weather data ETL/ DB stuff

Either Postgres or Pentaho seems to be a bit unstable on Windows and
caused a system freeze.  So doing a check-in to Github in case need to
work from another machine.

The following still need doing:
- Further data clean-up/ de-dup before loading from staging to public
- Put a job round Pentaho data transformation to better handle
error-handling, general flow control