Update viewport size in abstract navigation on resize, fix #169
Merge pull request #170 from hpicgs/navigation/arcball

Fix arcball navigation
implement Accumulated Antialiasing. Still Problems with camera matrices
implement super awesome functioning Antialiasing!!!
fix scene ownership conflict between Viewer and PipelinePainter
clean up unused classes such as effects or the framebufferobject
WIP: Merge branch 'rendering/glow_usage' into rendering/antialiasing

Conflicts:
	source/core/CMakeLists.txt
	source/core/include/core/camera/abstractcamera.h
	source/core/include/core/painter/pipelinepainter.h
	source/core/include/core/rendering/abstractpostprocessingstage.h
	source/core/include/core/rendering/abstractrenderstage.h
	source/core/include/core/screenquad.h
	source/core/source/camera/abstractcamera.cpp
	source/core/source/painter/pipelinepainter.cpp
	source/core/source/rendering/abstractpostprocessingstage.cpp
	source/core/source/rendering/abstractrenderstage.cpp
	source/core/source/rendering/renderstage.cpp
	source/core/source/screenquad.cpp
Complete merge of rendering/glow_usage with rendering/antialiasing
Use more ref_ptr in order to avoid memory leaks/access violations. Clean up some code in Canvas.
Merge branch 'master' into rendering/antialiasing
Merge branch 'rendering/antialiasing' into shadows/merge