Added option to specify outputdelimiter

Hi Harelba
As discussed per email, I have just added a switch to specify output delimiter independently of input delimiter.
This obviously works both as command line switch (-o or --outputdelimiter) and as an option in the .qrc file, where I have added a commented out example.
In my implementation it uses this if set, falls back to a set 'delimiter' or to the default (space). This was to not break backwards compatibility for people expecting it to work as previous (using the specified input delimiter), but might not actually be the most intuitive behaviour, now that I think it through?
Maybe a straight fallback to the default would be more clean?
/Jan