I've done the backwards compatibility fixing now.. deprecation warning raised and option keyword arg accepting.. 
Just a question - If somebody was to include the `warn_on_equidistant` parameter (they'd get a dep.warning and their code wouldn't break), should they still get the equal distances warning? or do I keep that removed, meaning that the `warn_on_equidistant` keyword will do nothing other than give them a deprecation warning?