optimize order overview
[#53375659] Fix bug: Shelf update problem
[#53375659] Improved test
[#53375659] Fix: Deal with new items
[#53055509] modellist hover fix property keys

Squashed commit of the following:

commit a06822a30b82aada74c5bec878e3863a0db33a3f
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Fri Jul 19 14:15:10 2013 +0200

    [#53055509] modellist hover fix property keys
[#53282857] forward current url params to language switcher

Squashed commit of the following:

commit 16c592f87ca7549a7ead7d628fc9cb85bb8394d2
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Fri Jul 19 15:21:53 2013 +0200

    [#53282857] forward current url params to language switcher
[#52973127] fix borrow search not showing

Squashed commit of the following:

commit 717ad0316b1c2496366a16b2a7cca2afd8577c32
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Fri Jul 19 11:43:48 2013 +0200

    [FIX CI] modellliste.feature

commit 2896b64f20c2c0983f409801ef580e24c260fe80
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Fri Jul 19 14:02:16 2013 +0200

    integration tests for not seeing models you dont have permissions for

commit a031bce8df5a3baf9bf9a92ca813892dde39b230
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Thu Jul 18 15:39:51 2013 +0200

    fix seeing models i dont have access for

commit 7665936d8ea741e2801b715e9dd25d224ba13ff9
Author: Franco Sellitto <franco.sellitto@zhdk.ch>
Date:   Fri Jul 12 11:13:13 2013 +0200

    introducing user.models.borrowable joining partitions_with_generals sql view
upgrading to Rails 3.2.13
removing test captures generating availability dot graph