Add functionality to save meeting as pdf without downloading it.

@maethu Add functionality to save meetings as pdf in the same folder without downloading it.

![bildschirmfoto 2014-05-22 um 19 11 10](https://cloud.githubusercontent.com/assets/557005/3057740/64ad228a-e1d9-11e3-8210-7566725489f3.png)

![bildschirmfoto 2014-05-22 um 19 11 42](https://cloud.githubusercontent.com/assets/557005/3057744/6c3275fa-e1d9-11e3-95c8-8d7a6763df7d.png)

![bildschirmfoto 2014-05-22 um 19 12 03](https://cloud.githubusercontent.com/assets/557005/3057743/6c305702-e1d9-11e3-809c-37cc16b28d01.png)

Missing:

- errorcatching if File is not allowed in folder