manually merging pull request:   https://github.com/novus/nvd3/pull/716/files
Remove unnecessary CSS, including CSS on svg elements so we don't conflict with site-wide dom.    Also don't fade in tooltips so damn slowly.
Allow for range of 1, refactor of https://github.com/novus/nvd3/pull/662
getX and getY are referenced below so not sure why they were missing, merged this:  https://github.com/novus/nvd3/pull/629
instanceof has a higher precedence than the ! operator, merging fix from https://github.com/novus/nvd3/pull/627
Add double click even to scatter: https://github.com/novus/nvd3/pull/615
elementClick with interactiveLayer returns list of points for lineChart, modification from pull request https://github.com/novus/nvd3/pull/655, fixes bug https://github.com/novus/nvd3/issues/466, for demo see lineChartZoom and watch console log.
rebuild to update examples.