Remove name from the light class. It is now maintained exclusively in the scene class.

Removes isLightRegistered, hasSceneObject
Adds removeLight

additionally adds a way to add optional requirements

- move the implementation to the cpp
- enforce const correctness
- add more descriptive documentation for certain functions

Refactor to add computBoundingBox to the entire scene
Remove Renderer::updateConfig and do the update in the setConfig itself
Remove unused include in the imstkKeyboardSceneControl

Did not touch imstkPbdModel as it's being worked on by andrew wilson

Adds SSAO to the rendering example

this should be used sparingly, for example for ignoring errors from dependent packages

These are the "simple" warnings, type conversions, unused var, comparison, etc