Bspcq

- Fix a number of bugs from the initial release.
- Selectors are improved.
- Receptacles won't break it.
- An empty bspc result will say it was empty, and not break.

**Full Changelog**: https://github.com/aidenlangley/bspcq/compare/v0.1.56...v0.1.58

- Fix `bspcq` running twice because of a call to `run()` in `bspcq.py`.

- Fix a bug where -D & -M flags would still print out child node data.

- Fix a number of build problems - still learning how to packaging Python projects.

- Organized source code a little.
- Fixed `xtitle` not printing correctly.
- Now prints version via `bspcq --version`.

Fixed issues with packaging - now available via `python -m pipx install bspcq`.