Download data transparently

Context

When asking for triples in a graph, an application might encounter no results, which might mean that there is not enough information available in the graph.

Decision

Transparently try to find the missing triples on the Matrix before returning results of the query. Add triples and rerun the query to see if information had been obtained.

Consequences

Plugin or application writers will have full illusion of querying the whole Matrix instead of their local graph, which is exactly what we want to achieve.