D47crunch

*Released on 2022-02-27*

New feature
* `D4xdata.covar_table()` allows exporting the variance-covariance matrix or the correlation matrix for the Δ_4x values of unknwon samples.

Changes
* New `hist` keyword to `D4xdata.plot_residuals()`, which adds a histogram of residuals to the side of the plot.

*Released on 2021-08-16*

Internals
* Remove HTML tags in all docstrings

*Released on 2021-08-08*

Bugfix
* Fix silly mistake in readme.

*Released on 2021-08-08*

New feature
* Support for Δ₄₈ standardization (cf section *Process paired Δ₄₇ and Δ₄₈ values* in the documentation).

Changes
* Extensive changes to the documentation, with new sections (*Tutorial* and *How-to*).
* Documentation is now built with `pdoc` instead of `pdoc3`.
* `D47data.simulate()` replaced by `simulate_single_analysis()` and `virtual_data()`, with additional functionality.
* New method: `D4xdata.report()`
* `D4xdata.table_of_analyses()`, `D4xdata.table_of_sessions()`, and `D4xdata.table_of_samples()` have a new argument `output` controlling what the method should return.
* `SAMPLE_CONSTRAINING_WG_COMPOSITION` is gone, replaced by `D4xdata.Nominal_d13C_VPDB` and `D4xdata.Nominal_d18O_VPDB`.
* `lambda_17` is now replaced by `LAMBDA_17` everywhere.
* Additional tests

Bugfixes
* Correct (or at least improve) computations of analytical repeatabilities in `D47data.repeatabilities()` and `D47data.compute_r()`.