Three Sample notebooks for Baseline.

These are very basic attempts at testing the availability of records
using ontologies and IOOS Core variable terms, model indicator strings,
and agency strings.
new files
Using `iris.FUTURE.netcdf_promote` to load sea level data as cube.
Uncommented the modification.
Merge pull request #97 from ocefpaf/new_iris_syntax

Using `iris.FUTURE.netcdf_promote` to load sea level data as cube.  Fixes #54
Merge pull request #92 from hdean83/Theme_1_Baseline

Three Sample notebooks for Baseline.