Consider only owned items.
[#56442432] automatische auswahl des geräteparks im kalender
[#56438864] create new supplier creating/editing/copying item
Fix missing template delete translation
[#55899466] removing leading and trailing whitespace on sort
[#56442432] consider ip selection

Squashed commit of the following:

commit 335ad0cc2844c3fadcba64ec25ddc8d2ede8351d
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Thu Sep 12 11:52:31 2013 +0200

    finish integration tests

commit 629052aa1000efae86839637017ebdf511fe3f81
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Wed Sep 11 16:21:49 2013 +0200

    consider ip selection when opening calendar
try to make the order completion more understandable
beta.1 is stable.
[#56438864] Create supplier in item forms
Automatically authorize anyone who logs in through AGW for 'Veranstaltungstechnik'
[BUG FIX] validates item changes on update as well
[HOT FIX] test for ensure that you cannot edit specific fields for an item that is not in stock
Fix CI: gegenstand editieren
(temp try) removing therubyracer gem
Test contract presence validation for edit item
Revert "(temp try) removing therubyracer gem"

This reverts commit b0d2e1a5423259eb2023138442f81895cc6240b9.
[HOT FIX] hand over stack level problem
Test: Inventory helper retire item which is not in stock WIP
Explorative Suche.Explorative Suche in der Aushaendigung
Inventory helper tests: retire item validation & correction of other tests