update changelog

Merge pull request #132 from ycexiao/fix-docs

chore: fix docstrings to generate  API page.

Merge pull request #130 from zmx27/update-docs-dependency

chore: sync conf.py extensions with docs dependencies listed in requirements folder

Merge pull request #126 from zmx27/fix-sasmodels

refactor: update sasview api for test_sas.py

update changelog

Merge pull request #113 from diffpy/migration

chore: bring code up to latest group standards

Release 3.0.0

See CHANGELOG.md for detailed release notes.

Release 3.0a0

Changes since v1.2

* Convert for Python 3.4 or later.  Drop support for Python 2.
* Move package files to the src directory.
* Activate the Napoleon extension for sphinx.
* Permit zero thickness in `sheetCF`.
* Adopt namespace package support per PEP 420.
* Generalize `WeakBoundMethod` interface and fix its pickling.
* Replace duck-taped bound methods with regular methods.
* Remove unnecessary custom pickling of bound methods and `numpy.ufunc`.
* Switch to automated `TestCase` discovery.
* Support test selection in the debug script.
* Use `unittest.skipUnless` for conditional tests.
* Improve API for the abstract `Operator` classes.
* Remove unused `ListOperator` and `SetOperator` classes.
* Clean up issues reported by pyflakes.

Release 1.3

Changes since v1.2

* Move package files to the src directory.
* Activate napoleon extension for sphinx.
* Permit zero thickness in `sheetCF`.
* Convert `print` statement to a function.
* Generalize `WeakBoundMethod` interface and fix its pickling.
* Replace duck-taped bound methods with regular methods.
* Remove unnecessary custom pickling of bound methods and `numpy.ufunc`.
* Switch to automated `TestCase` discovery.
* Support test selection in the debug script.
* Improve API for the abstract `Operator` classes.
* Remove unused `ListOperator` and `SetOperator` classes.
* Declare namespace package with builtin pkgutil module.
* Clean up issues reported by pyflakes.

Release 1.2

Changes since v1.1

* Fix application of replaced profile to residual.
* Simplify interface to setResidualEquation.
* Convert ParameterProxy to Parameter subclass.
* Keep order in the ParameterSet hierarchy.
* Fix the sheetCF characteristic function.
* Fix return value from Printer visitor.
* Remove unused imports reported by pyflakes.
* Add access to model and residual expressions in FitContribution.
* Swap equation literals also by names.
* Extend test coverage for FitContribution methods.
* Release obsolete Equation objects.
* Avoid leaking objects to global builders.
* Remove spurious assignments to Profile.ycalc.
* Remove local implementation of OrderedDict.
* Remove backport of the standard abc module.
* Avoid zombification of Equation objects.
* Adjust for conda-build 2.0.
* Replace all arguments in detached Equation objects.
* Use weak-references to store observer callbacks.
* Add configuration file for the test coverage tool.
* Make the project tarball reproducible on Mac OS X.
* Use short hash in commit created by `make publish`.
* Add convenience script for debugging unit tests.
* Rename EquationFactory.detach --> wipeout.
* Enable setting qmin for real-space PDFGenerator.
* Fix invalid example CIF file.
* Remove obsolete example with simulated annealing.
* Improve behavior of Profile.setCalculationRange.
* Remove ior operator from FitContribution interface.
* Fix type of class-defaults in RecipeContainer.
* Fix argument naming in RecipeContainer.iterPars.
* Improve formatting of RecipeContainer.show().
* Use numeric sort for RecipeContainer.show() output.
* Implement output filtering for RecipeOrganizer.show.
* Support constant expressions in EquationFactory.