Update option.xml

Add option news_enable_empty_recycle_bin_cycle to control automatic removal of trashed news.
0 = disable removal.
Update de.xml
Update en.xml
Update de.xml
Update PublicationCronjob.class.php

Adds deletion of trashed news i.a.w setting news_enable_empty_recycle_bin_cycle in option.xml.
0 = no deletion
Merge pull request #6 from UdoZa/1.1.0

Option to empty recycle bin automatically