ROI.format.cbf news

ROI.format.cbf 0.1-0

• Initial CBF reader and writer integration for ROI via read_cbf() and write_cbf().
• Added CBLIB download helpers cblib_download() and cblib_download_all() for fetching benchmark instances from https://cblib.zib.de/download/all/.
• Downloaded CBLIB archives are decompressed to .cbf by default so they can be passed directly to read_cbf().
• Added unit tests.