Merge pull request #768 from takeit/master

update symofny2 to 2.3.*@dev
updated translation resources
updated translation resources
clear comments cache after chnaging status
clear article image cache
clear article image cache, fix namespace
fix creating object_id in article
Merge pull request #770 from ahilles107/master

clear comments cache after chnaging status
improved newscoop installation guide for ubuntu
Merge branch 'master' of https://github.com/sourcefabric/Newscoop
[CS-5475] Manage backgound jobs via backend