Brooklyn 20 apache rat

This resolved BROOKLYN-20

Note, this is dependent upon https://github.com/apache/incubator-brooklyn/pull/43
@richardcloudsoft comments on excluding these? For `couch.uri`, the note at the top says `##### Brooklyn note: File from OSX distribution of Riak 1.4.8`. What are the implications of that?! We certainly can't claim license as apache.