Catalogs of entities

Provides views of latest publications, people, annotations, groups etc.

Note: existing views were refactored for more unified code, so the diffs are large in some cases, but insignificant (about, terms, privacy pages etc. due to removal of the unnecessary .simple class)
It should output [this](https://github.com/peerlibrary/meteor-peerdb/blob/master/server.coffee#L754).