Added ticket view for not signed in users. 

We're going to use cerberus as support portal and changed some things (e.g. public ticket view without login). 
![ticketviewer](https://f.cloud.github.com/assets/3023342/78106/f9d9a1b2-616f-11e2-9273-2e3b23c11e11.png)
![ticketviewersettings](https://f.cloud.github.com/assets/3023342/78107/01ef5888-6170-11e2-93e2-db159eec221c.png)

Furthermore I added some translation to templates (espacially in support center, public viewed) and added the option to automatically send a confirmation email to customers after send in a new ticket (containing the link to the public ticket view).
![contactus](https://f.cloud.github.com/assets/3023342/78109/23d53170-6170-11e2-9af1-6ed0f9467a2b.png)