[REF](behaviors) resize, drag and select now all use base functionality of dragBase. This way all inherit previous improvements made to the select behavior, related to the mouse events are attached.
[FEAT](OrdinalScale) The range array now features the original min and max continuous values that gave rise to it, by a split operation.
[FEAT](OrdinalScale) New method #invertIndex similar to #invert of quantitative scales.
[PERF](pv.extend) Uses Object.create when available.