Added buffered streams to AES_ECB_Crypter
Added buffered streams to BackupJob and RestoreJob
Improved vault update dialogs

- Renamed some strings
- Set ProgressDialogs to not cancelable
- Fixed ProgressDialog does not disappear when changing the passphrase
fails
- Added some German translations
Added German translations for backup and restore strings
Merge pull request #34 from L-Henke/vaultUpdateFix

Vault update fix (partly induces by faulty merge)