Backtracks

**Full Changelog**: https://github.com/wbalmer/backtracks/compare/v0.6.1...v0.6.2

**Full Changelog**: https://github.com/wbalmer/backtracks/compare/v0.6.0...v0.6.1

This release contains a number of small improvements to the tutorials, and will (hopefully) automatically generate a zenodo DOI for citation in upcoming papers.

**Full Changelog**: https://github.com/wbalmer/backtracks/compare/v0.5.0...v0.6.0

Since the source id issue was breaking the pypi release, I've bumped `backtracks` to v0.5!
All updates are now uploaded to pypi

What's Changed
* Swap ra axes limits on plots, update tutorial notebook by wbalmer in https://github.com/wbalmer/backtracks/pull/51
* Moved radecdists to utils.py, additional info on NOVAS in docstrings by gotten in https://github.com/wbalmer/backtracks/pull/52
* Slightly updated docs. by gotten in https://github.com/wbalmer/backtracks/pull/54
* Protect against maskedconstant return from gaia query of no RV by wbalmer in https://github.com/wbalmer/backtracks/pull/55
* Check SOURCE_ID and source_id by tomasstolker in https://github.com/wbalmer/backtracks/pull/56


**Full Changelog**: https://github.com/wbalmer/backtracks/compare/v0.4.0...v0.5.0

What's Changed
* Updated Actions workflow by tomasstolker in https://github.com/wbalmer/backtracks/pull/46
* Wordy tutorial that includes pure stationary case before running fit. by wbalmer in https://github.com/wbalmer/backtracks/pull/48
* Explicitly set reference epoch, save chi2 to object, and fixes plotting for stationary tracks by wbalmer in https://github.com/wbalmer/backtracks/pull/47
* Updated docstrings + bugfix pol2car by gotten in https://github.com/wbalmer/backtracks/pull/50


**Full Changelog**: https://github.com/wbalmer/backtracks/compare/v0.3.4...v0.4.0

What's Changed
* Fixed time scale of the Julian Dates (Terrestrial Time for calls to app_star) - Closes 29 by gotten in https://github.com/wbalmer/backtracks/pull/33
* Introduce host star priors, based on 5D+RV Gaia statistics (incl. covariance) by gotten in https://github.com/wbalmer/backtracks/pull/37
* Split host RV prior and allow RV prior override. by gotten in https://github.com/wbalmer/backtracks/pull/43

**Full Changelog**: https://github.com/wbalmer/backtracks/compare/v0.3.3...v0.3.4