[#30776841] enhanced packages

Squashed commit of the following:

commit 86963b327049df7b0a92b2be84f4cf9388a690c7
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Wed May 22 09:30:40 2013 +0200

    [FIX CI] pakete.feature

commit 07a677e9b9b0a9c32f767eee74ac21dc7f9c6d0f
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Tue May 21 15:31:36 2013 +0200

    not in stock package is editable now

commit cc5fb2838e2047db72e663acc3b2bef99c717501
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Tue May 21 14:45:42 2013 +0200

    no empty location for items

commit c1ff08293f186db3abcd90afe2f9b43170879a82
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Tue May 21 14:40:53 2013 +0200

    show notification if model is saved and new packages are created

commit 2c7bb6e3531c7aaa7c9b23e1f3351cb4e025aef9
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Tue May 21 13:18:36 2013 +0200

    make package editable even if its not persisted yet

commit db4eef7b556ab1a32db6821565546ba340ded133
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Tue May 21 11:42:30 2013 +0200

    fix button layout for edit and add packages to model