* ALL: basic skeleton for a streaming-wizard (refs #13)

* ALL: basic skeleton for a streaming-wizard (refs #13)

    done:
    - all items are included with complete l10n support
    - checkboxes and select-file-buttons behave as they are supposed to

    todo:
    - implementation of the logic, i.e. handling of the collected values, respective manipulation of the GUI, start of the stream
    - move some arrays to an external header file
    - some GUI things (e.g. radio buttons on page 2, etc. - see FIXMEs)
    - implementation of some help-dialogues (it might be necessary to create a re-usable window in the nib for that, since NSAlert is Panther and Tiger only)
    - l10n string fixes (both in OSX and WX)
    => most of the work still needs to be done