removing old frontend code and upgrading to Rails 3.2.14

Squashed commit of the following:

commit 53f4368b1f2d3f21479199336ad2d75d16d01dbd
Author: Franco Sellitto <franco.sellitto@zhdk.ch>
Date:   Wed Jul 24 15:10:55 2013 +0200

    upgrading to Rails 3.2.14

commit 3bba6af566e369fcd1cee4b4aa290eb48ae5be43
Author: Franco Sellitto <franco.sellitto@zhdk.ch>
Date:   Tue Jul 23 10:08:26 2013 +0200

    removing old frontend views

commit e3fe49d2fee49f82edc9f973eb87e5fe121f2388
Author: Franco Sellitto <franco.sellitto@zhdk.ch>
Date:   Tue Jul 23 09:51:40 2013 +0200

    reverting old frontend models_controller (2 methods)

commit 980175a31449f0279b6117e0bc3d808322b8bb0b
Author: Franco Sellitto <franco.sellitto@zhdk.ch>
Date:   Mon Jul 22 17:04:28 2013 +0200

    removing old frontend controllers