"Professional CMake" book suggest the following:
"Targets should build successfully with or without compiler support for precompiled headers. It
should be considered an optimization, not a requirement. In particular, do not explicitly include a
precompile header (e.g. stdafx.h) in the source code, let CMake force-include an automatically
generated precompile header on the compiler command line instead. This is more portable across
the major compilers and is likely to be easier to maintain. It will also avoid warnings being
generated from certain code checking tools like iwyu (include what you use)."
Therefore, removed the "#include <PreCompiled.h>" from sources, also
there is no need for the "#ifdef _PreComp_" anymore
This adds optional origin indicator ofr SoFCPlacementIndicator. This is
something that can be used to clearly indicate origin placement with
small sphere.
This adds SoFCPlacementIndicatorKit - a node that can be used to
show position of object to the user. It can be configured in various
ways so it should be a good base for future unification of features like
this across the application.
