Comments.

Signed-off-by: Denis Dik <denis.dik@hs-furtwangen.de>
Merge remote-tracking branch 'remotes/origin/develop' into SceneManagement
SceneMagaer as Singleton, generic get components methods.

Signed-off-by: Denis Dik <denis.dik@hs-furtwangen.de>
Time and light modified

Signed-off-by: xMotUx <WaldemarRose@gmx.de>
Edited Time and modified light
Implemented new Visitor Pattern with double dispatch.

Signed-off-by: Denis Dik <denis.dik@hs-furtwangen.de>
Merge branch 'SceneManagement' of https://github.com/FUSEEProjectTeam/Fusee into SceneManagement

Conflicts:
	src/Engine/Components/SceneManagement/ITraversalState.cs
	src/Engine/Components/SceneManagement/SceneManager.cs
	src/Engine/Components/SceneManagement/TraversalStateSearch.cs
Implemented light traversals.

Signed-off-by: Denis Dik <denis.dik@hs-furtwangen.de>
Merge branch 'SceneManagement' into develop