Prevent brushing from propagating to reordering

Prior to d3 v3.2.2, the brushstart event would automatically call d3.event.stopPropagation(). When using d3 v3.2.2+ with a plot that's brushable and reorderable, the axes can be reordered while brushing. This change preserves the original behavior.
Remove TODO from brushReset description
added contributor
Corrected typo