Fix bug with HistHiLite 'Clear Restrictions' button.
Add toggle button control.
Add val() accessor to ToggleButton.
Add option boolean argument to Histogram.showCurves.
Add set method to ToggleButton.
Refactor ToggleButton out of HistHiLite.
Make some basic controls show up for Sample.js.
Check in correct demo for ToggleButton control.
Basic ComboBox control.
Rename combobox values parameter to options.
Add val accessor to ComboBox widget.
Add options accessor/modifier to ComboBox.