* added a summary-tab at the end of the wizard (mostly for debug-reasons, but perhaps we want to keep that for the user as well?)
* implemented the entire logic (except encap-formats while transcoding)
* added data collection of all values
* fixed some l10n issues

The wizard is still not useable for streaming, since it does not communicate the settings to the core yet. Additionally, various things still need to be done (see TODO at the beginning of the file).