revyver/perpetual — pull request #12 by bryanveloso (2012-03-04 11:01:19+00:00)
Title: Range Slider

This implements a range slider, using [`SMDoubleSlider`](http://developer.snowmintcs.com/controls/smdoubleslider/). This removes the need to have two separate `NSSlider`s, since `SMDoubleSlider` implements both knobs on a single track.