update demos to use rectangle.fromDegrees
Merge pull request #1638 from AnalyticalGraphicsInc/extentFromDegrees

Update sandcastle demos to use Rectangle.fromDegrees
Simplify reserved property checking DynamicObject.
Fix #1633, SceneModePicker problems with non-default mode on startup.
Merge remote-tracking branch 'origin/master' into dynamicScene-rectangle
Always complete the morph when duration is zero.
A more correct check for reserved property names.
Merge pull request #1629 from AnalyticalGraphicsInc/dynamicScene-rectangle

DynamicScene support for RectangleGeoemtry
Merge pull request #1639 from AnalyticalGraphicsInc/sceneMode-startup

Fix #1633, SceneModePicker problems with non-default mode on startup.
Merge remote-tracking branch 'origin/master' into dataSource-refactor