v0.5.0: bugfix for nested blocks

This release contains a bugfix, which led to an overestimation of the number of blocks in the case of nested blocks (constantly switching between two blocks that overlap).
It also adds a --strict flag, that makes the plot respect exactly the interval that you specified without making them longer based on the reads encountered in that interval.
Finally, there is now a --summary option, which will create a summary file specifying the number of blocks and the block boundaries per sample.

Please let me know if you would like a musl build!

Full Changelog: v0.3.0...v0.5.0