Connect CoG to ES-DOC infrastructure

[LucaCinquini]

Who: Luca

Use the "furtherinfo" URL to connect CoG to ES-DOC documentation.

From: https://docs.google.com/document/d/1vsqeEDutNcZN4pHK534MAnkF5sKXcmjPAEfADdJNeF0/edit

"The further_info_url has the form:
http://furtherinfo.es-doc.org/<mip_era>.<institution_id>.<source_id>. <experiment_id>.<sub_experiment_id>.<variant_label>
(e.g., “http://furtherinfo.es-doc.org/cmip6.MOHC.HadCM3.historical.none.r3i1p1f1”). "

By end of April, all of CMIP5 data should be converted to this system, so CoG can be tested to make this connection for CMIP5 data.

[taylor13]

This came up again today when we were discussing ES-DOC, so just a reminder that a link needs to be included at the dataset level (I think) to ES-DOC.