Generalized StickyToggleButtons to support any types, not just boolean, see #71
Updated to use new Matrix3 API, see #71
rewrote StickyToggleButtonModel to take valueA, valueB and Property over values instead of a boolean property, see #71
rewrote toggle buttons to use revised StickyToggleButtonModel, see #71
removed vestigial options to Node constructor, which were also removed in master by JB
removed vestigial options to Node constructor
Merge branch 'toggle-button-values'