Migrate as much of the setup.cfg file to the pyproject.toml file as w… …e can.

Migrate as much of the setup.cfg file to the pyproject.toml file as w… …e can.

Use reification input type to construct the output 

Use the current `op` to determine which `etuple` function to use The first argument passed to `etuple` determines which of the registered functions is called. The first argument is generally an `ExpressionTuple`, the etuplized version of the operator. However, when using subclasses of `ExpressionTuple` to customize evaluation, we want `etuple` to depend on the current operator and not its etuplized version.

Add a method to specify ExpressionTuple evaluation function 

Add a method for generic ExpressionTuple evaluation 

Add rator and rands transform options to etuplize 

Remove an unnecessary stack overflow-generating test 

Allow generator evaluation results 

Merge pull request #8 from brandonwillard/unify-kwdargs Make keyword arguments unifiable and reifiable