Allow renaming chromosome names in bigWig/bigBed files.

[ghuls]

It would be nice if there was a CLI tool that would allow renaming chrosome names in bigWig/bigBed files where it would only update the chromosome_tree_block part of the bigWig/bigBed file and zero copy the rest of the data.

[ghuls]

To clarify, this would sometimes be useful if you have a bigWig file with e.g. Ensembl chromosome names, but want UCSC chromosome names to view the data in UCSC genome browser.