openlayers/ol3 — pull request #1470 by twpayne (2014-01-06 15:22:45+00:00)
Title: [vector-api] Display attributions and logos for vector sources

This PR enables the display of attributions and logos for vector sources.

Vector attributions are always displayed, whether or not data from the source is visible. If more sophisticated control of attributions is needed, this can be done in a separate PR.