feat: organization’s graph

[vladimirleonidovich]

As I understand it’s not possible to fetch an organization’s recent activity and when a user enters let’s say swiftlang “An error occurred …” message appears. Maybe we could determine that we fetch an organization’s graph and report with more useful message like “Fetching organization’s graph is not supported” or something else.
Also, if #31 ’d be implemented we could exclude organizations at all!