Move delete templates to core app and create a new one for descriptions
Temporarily carved out Solr model conversion stuff and moved search-dependent bits to core
Move annotation, link, systemEvent controllers/views to core. Temporary commenting on bits that depend on users/groups
Move UserProfile/Group controllers to core module
Fix tests
Split out vocabs/concepts into their own module/app.

There are still some issues, namely the routes not being properly
initialized when we need to build the menu. This is apparently
described here:

https://groups.google.com/forum/#!topic/play-framework/srfGHJfyjmI
Move auth set and historical agent to their own module. Tests are
currently failing because of the route initialization problem, but
this will hopefully be resolved when the relevant tests are moved
inside their respective modules.
Consolidate routes and settings
Add a hacky workaround for the subproject routing problem