Merge pull request #328 from peerlibrary/search-cleanup2

Search cleanup
Updated CC0 license to version 1.0 and newer and mention patents.

There might be future CC0 licenses, so we should allow upgrading. Additionally, CC0 licenses do not deal with any possible patents people might publish through their contributions, so if we really want contributions to be freely reusable, we should mention this explicitly. Users should not posting publicly things they do not want shared or reused through PeerLibrary.
Added Scribe rich text editor Meteor package. Fixes #332
Define package conflicts with jQuery UI and is not really needed.
Merge branch 'master' into permissions