Add GCI org admin and mentors

[jayvdb]

Im not sure how to get it using open data methodology , but lets try... ;)

[li-boxuan]

Seems mentors (email address) can be fetched via GCI API
https://developers.google.com/open-source/gci/resources/downloads/TaskAPISpec.pdf

[jayvdb]

only for one org.

[jayvdb]

#166 will provide a good mechanism for collecting the most relevant people within each org - but then we need to add heuristics to filter for which are GCI mentors.