Features
* Granularity of clustering of adjacent breakpoints can now be controlled using newly-introduced `--clustering_threshold` CLI option
* `breakpoint_window` in the output file `breakpoint_locations.bed` now refers to all clustered breakpoint locations with >= `--min_supporting_reads`
* Removed `--cov_window_size` for looking at output `breakpoint_foci` - a fixed window is now always produced around each focus (=putative breakpoint location).