add missing includes
remove testing files from git
update VTK_CMake_init.txt
cmake cleanup
replace loader assertion by error messages
move Loader to core/io/, move data transfer from vectors to VTK format to MatricesToVtk
support loading of images/3D grids from VTK XML image format
Merge branch 'master' into profilePlot_contextView

Conflicts:
	core/CMakeLists.txt
implement automatic plot line update
move chart handling to RendererImplementationPlot , allowing to put plot multiple data sets in one view
add visibility toggle for context data
fix plot removal
add some context2D configuration options
remove obsoleted ImageProfilePlot, RenderViewStrategyImage2DPlot