Extended text and trigram search for admin/users

Squashed commit of the following:

commit af4a4cacc7ae68ec6ba91438eeb4f104bc736514
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Feb 18 10:13:20 2014 +0100

    Added test for extended admin / users search feature

commit 8fb1f1b61c348a8a440459028562a287efdf4132
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Feb 18 10:05:25 2014 +0100

    Fix features

commit e1469e24d46a220389b7d457184362393fcd0547
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Feb 18 10:01:31 2014 +0100

    Updated personas db and fixed feature

commit 8974f111e3cd0912a6499040e12bf14ddc581cfe
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Feb 18 09:31:28 2014 +0100

    Refactored trgm search on admin / users for production
Respect pseudonym field when searching users
Generalizing and sanitizing rank searching
Extended text search on admin/people

Squashed commit of the following:

commit 5fc5d42b11041d919fa131e95315997bdc59cce3
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Feb 18 17:49:37 2014 +0100

    Revert to jsbrowser

commit 3359b85a48d098baddeb4f3a07d4f294996bd53b
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Feb 18 17:39:48 2014 +0100

    Feature test adjustments

commit 583858649c1458ee776b131db7cde7e44498de3a
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Feb 18 16:54:22 2014 +0100

    Migrated personas db

commit d3467de0fa73a30470aa03b5425fb34f93f99cc5
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Feb 18 16:52:26 2014 +0100

    Fix and finish people text search

commit 9516223b21c997ef974c04dbe2cc837c5bd51c6f
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Feb 18 14:04:59 2014 +0100

    Wip searching on admin/people

commit a235bdec98dc70e6ea13bb271a8c396c0a162a9c
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Feb 18 13:22:49 2014 +0100

    Wip searching on people

commit d917e12e53447e4a3daf93fafa81e84d7707a283
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Feb 18 10:41:26 2014 +0100

    Added searchable field to people
Implemented extended search on admin/groups
Fix Zugriff auf Übergeordnete sets
Removing dropdown action from list view
Add video-js.png explicitly to assets precompilation

, so it can stay in vendor/..
Compiling all pngs