Ingest Licenses as vocabulary
Information about licenses in rdf/ttl format: https://github.com/spdx/license-list-data/tree/master/rdfturtle
Could be used as source for a License-Vocabulary.
(notify: @lbarbot, @ymoranv, @klaus.illmayer, @sotiris.karampatakis, @clara.petitfils, @mkozak, @tparkola )