What's New
Features
* [Inequality join](https://pandance.readthedocs.io/en/latest/operations/ineq_join.html) operation added, matching one column's values that are less / greater than the other column's values.
* Parallelized [Theta join](https://pandance.readthedocs.io/en/latest/operations/theta_join.html)
* Changed `theta_join()` arguments (and documentation) to use the term "condition" instead of "relation".
Performance
* Large performance improvements for `theta_join()`: x25 increase in speed on the [benchmark](https://pandance.readthedocs.io/en/latest/usage/getting_started.html#perf-ineq-join), and avoids an intermediate Cartesian join that can quickly consume all memory for larger inputs.
* Slight performance improvements for`fuzzy_join()`
Documentation
* Clarified time complexity and worst case for [Fuzzy join](https://pandance.readthedocs.io/en/latest/operations/fuzzy_join.html)