========= Changelog ========= v1.0.3 2020-09-08 - *deep* parameter added to :meth:`staircase.Stairs.copy` method for pandas compatability v1.0.[1|2] 2020-09-02 - Bugfix with Pandas 1.1.x where SortedSet cannot be used as basis for Series or DataFrame v1.0.0 2020-09-01 - Updated documentation to include :ref:`A note on interval endpoints` - parameter *start* in :meth:`staircase.Stairs.layer` made optional to make method symmetric with respect to time - removed *staircase.Stairs.evaluate* method (superseded by :meth:`staircase.Stairs.sample`)