Check strict rather than deep equality in QueryInfo#setDiff.
Check strict rather than deep equality in QueryInfo#setDiff.

It's not the QueryInfo class's job to question the structural equality of
new results. The ObservableQuery will do that later, using its
isDifferentFromLastResult method. However, it is truly pointless to dirty
the QueryInfo if exactly the same (===) diff.result is reported.

apollostack/apollo-client,apollographql/apollo-client,apollographql/apollo-client,apollostack/apollo-client,apollostack/apollo-client