chainladder 0.7.0

Bug fixes

• TailBondy now works with multiple (4D) triangles
• TailBondy computes correctly when earliest_age is selected
• Sub-triangles now honor index and column slicing of the parent.
• fit_transform for all tail estimators now correctly propagate all estimator attributes
• Bondy decay now uses the generalized Bondy formula instead of exponential decay

Enhancements

• Every tail estimator now has a tail_ attribute representing the point estimate of the tail
• Every tail estimator how has an attachment_age parameter to allow for attachment before the end of the triangle
• TailCurve now has slope_ and intercept_ attributes for a diagnostics of the estimator.
• TailBondy now has earliest_ldf_ attributes to allow for diagnostics of the estimator.
• Substantial improvement to the documents on Tails.
• Introduced the deterministic components of ClarkLDF and TailClark estimators to allow for growth curve selection of development patterns.