Make geocoder flights in the correct coordinate system.
Fix geocoder flights in 2D and remove unneeded code.
Fix mouse handling after flight in Columbus view.
Add CZML description property handling.
Merge pull request #1398 from AnalyticalGraphicsInc/issue1374

Fix issue #1374.
Tweak CHANGES.md
Add description text to the view model.
Make Viewer.trackedObject an observable.

Removed `Viewer.objectTracked` event which is no longer needed.
Merge branch 'viewer-trackedObject' into selection

Conflicts:
	Source/Widgets/Viewer/viewerDynamicObjectMixin.js
	Specs/Widgets/Viewer/viewerDynamicObjectMixinSpec.js
Make viewer.selectedObject observable.
Rename selectedItem to selectedViewModel

We will probably change the names again in the future, but this helps eliminate confusion for the time being.  Also add a method to select a node by it's id.
Merge branch 'dataSourceBrowser' into dataSourceBrowser-selection
Merge branch 'selection' into dataSourceBrowser-selection

Conflicts:
	Source/DynamicScene/CzmlDataSource.js
	Source/DynamicScene/DynamicObject.js
	Source/Widgets/Viewer/viewerDynamicObjectMixin.js