Added clear() method to tree object
reduced size of favicons in stylesheet
extracted the events and update method from TabsOutlinerObject to a new EventHandler object.
added widget into EventHandler object
added call to EventHandler in start function
added new guard in TabsOutlinerPane reset function
updated tree style in the pane display, and used getClass to get the name of the object that is being displayed for root nodes.
updated comments (commented out comments in tree, added more details to the update method call in main)
removed stale styles
updated readme header