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