An OBS source service: wget download in bunch tool

This is a source service for openSUSE Build Service.

It supports mass downloading files from given URL via wget.
It accepts a URL, with the same syntax found for obs-service-download_url,
then it bunch downloads all files linked from that url, without ascending
to the parent directory. Some wget options are (optionally allowed) notably
to specify depth recursion level (def: 1), pattern/file to download (def: all),
destination directory. Destination directory is then tar-compressed (same compression
types supported by obs-service-recompress).