New features
* Exact (non-interpolated) summary calculation on binned ranges using `fetch(chrom, start, end, ..., exact=True)` (https://github.com/nvictus/pybbi/pull/33)
* Zoom record queries via `fetch_summaries()` (https://github.com/nvictus/pybbi/pull/33)
**Full Changelog**: https://github.com/nvictus/pybbi/compare/v0.3.6...v0.4.0