Update Schema diagram after renaming to MetaDatumInstitutionalGroups
ui: tile view: fix link on thumbnails, background color
ui: set: featured: fix typo

now Sets look like Sets
Fix unathorized access to media_resources#browse for guest users
Set stable version to 2.2.0
Fix migration for production data

*rerun reindex migration, collides with code changes
ui: .metadata-box.compact: better text width
Admin interface: list only the latest zencoder jobs in scope of media file
Admin interface: fix incomplete encoded videos filter in MediaFile section
provide missing autocomplete css in admin
ui: resources list: fix sorting menu
Clean inconsistent data: a set is never a cover

* Remove auto cover setting
* Debug media_resource_arcs_controller
Add doc/diagrams/Schema_vision.graffle
Add simplecov gem; initialize coverage; attach coverage output to ci
Close open ftp connections during import
Rename ldap_ to institutional_group_

Squashed commit of the following:

commit 07ac25998b53fc60ed2bccc8a982edd56782f2d9
Author: Thomas Schank <DrTom@schank.ch>
Date:   Mon Oct 6 10:15:48 2014 +0200

    Rename ldap_x to institutional_group_x in code

commit 4e3c3d681e93d967f2b1e4180a8ba639c479f059
Author: Thomas Schank <DrTom@schank.ch>
Date:   Mon Oct 6 09:59:54 2014 +0200

    Rename ldap_x to institutional_x in groups table
Admin interface: fix setting special sets

Squashed commit of the following:

commit 757601840443052befc6cfd6674b7ed75d7d6049
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Mon Sep 29 15:34:16 2014 +0200