ENH: Simplfy reduce, Almost done still Working on CVBestSearchRefit
ENH: Little changes on CVBestSearchRefit
ENH: Simlify reduce almost done, still do not pass unit test TestCVBestSearchRefit
BUG: differences bewteen sklearn CVGridSearch and epac CVSearchBestRefit caused by different order of arguments that get the same test score, so different models are picked
ENH: human improve printing Results and ResultSet
ENH: CVSearchBestRefit
BUG: Results stack
BUG: keep execution order in CV reduce
ENH: simplify reduce done, pass test_primitives unit test, TODO test_workflow