Added journalization for document removing and restoring.

Fixes #661

![bildschirmfoto 2014-11-19 um 13 29 57](https://cloud.githubusercontent.com/assets/485755/5105668/336c420a-6ff0-11e4-975a-19d3096b7be1.png)

Additionally:
 * I dropped the no longer used document state change journal handler 
 * I unify and adjust the journal translations for a better differentiation between trashing and removing a document.

@lukasgraf please have a look.