Reencode broken videos; Started new Admin interface;  Upgrade

Squashed commit of the following:

commit ef200fae42afdc5894cc9b01f5e2749b06a168d9
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Apr 9 14:56:31 2013 +0200

    Finishes this

commit 805d347261d5ffb417c9d2d20d8434338f7748c5
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Apr 9 14:24:54 2013 +0200

    wip

commit a87b56e5e2b0509d4ce332e14b4f769afae64a65
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Apr 9 10:58:21 2013 +0200

    wip, button to add

commit 782121f4f34d3a9b85e33dcf92c02f93229d97ff
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Apr 9 10:37:20 2013 +0200

    wip

commit 2464d2f285513ad8de34afc2631caca9cf4223c2
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Apr 9 09:36:07 2013 +0200

    wip

commit 65e508d9b7f77297ecc4ff1f66705af9ab1b55db
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Apr 9 09:24:52 2013 +0200

    previews

commit 9290f19727576dbd7da07398e22fb4d8ef80fa20
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Apr 9 09:05:27 2013 +0200

    wip

commit e91eb7cff3005e3803d44d0d41387bf08833e36f
Author: Thomas Schank <DrTom@schank.ch>
Date:   Mon Apr 8 16:33:14 2013 +0200

    Gems update, Application Admin