Refactor the ViewElement calls into the VIew
Add Stereo Interface to view
Move Stereo Functionality from OsgView into View
Serialization support in View

Does not complete serialization just add most of the enabling properties, refactor some setters
Fix linux crash due to deallaction order with keyboard and mouse handler in static scope
Merge branch 'master' into feature/add-stereo-view

Conflicts:
	SurgSim/Graphics/RenderTests/RenderTest.cpp
Merge branch 'feature/add-stereo-view' into 'master'

Add stereo capabilites to view

Merged-on: https://www.assembla.com/code/OpenSurgSim/git/merge_requests/870193