Preliminary changes to integrate minerva.
Created React.
Created reactive module to cleanly observe and react to property changes.  Need to finish changing current "Listenables".
Converting transforms and projections to use reactions.
Adjusting UIElement for minerva modifications.
Migrated Framework to use minerva.  Using minerva Thickness now.
Using new UIReaction instead to automate reactions to ui changes. Integrated UIElement, FrameworkElement, Border.
Integrated Control.
Invalidating border when corner radius changes.
Fixed point reference.
Integrated StackPanel.
Integrated Panel.
Modifying Panel to interop with minerva visual tree.
Integrated canvas.
Integrated ContentPresenter.
Integrated Popup.
Integrating ScrollContentPresenter.
Integrating Thumb.
Integrating ScrollBar.
Integrating ScrollViewer.