Properties Panel

Carve needs a dockable Properties panel for when an object is selected. This panel should initially sit along the bottom of the editor and can be as simple as an uneditable table view of the attributes defined on the selected object. Future versions should, of course, allow the user to change the values and only show the 'most important' attributes for that element type.

The Properties panel should update any time a new object is selected in the DOM Browser, Design mode, etc.