slightly different bads handling
installing header files
Merge branch 'FlorianRudolf/fix-cmake' into next
Merge branch 'FlorianRudolf/feature-algorithm-healing' into next
Merge branch 'FlorianRudolf/feature-algorithm-healing' into FlorianRudolf/fix-cmake
Merge branch 'FlorianRudolf/feature-algorithm-extract-plc-geometry' into FlorianRudolf/fix-cmake
Merge branch 'FlorianRudolf/feature-algorithm-geometry-generator' into FlorianRudolf/fix-cmake

Conflicts:
	include/viennamesh/core/basic_parameters.hpp
integrated pugi into viennamesh (utils), fixed ViennaMeshConfig.cmake and its generation (include directories, libraries)
Merge branch 'FlorianRudolf/fix-cmake' into next
added interpreter factory (no interpreter is created more than once)
Merge branch 'FlorianRudolf/feature-algorithm-geometry-generator' into next
slightly better healing management (better performance)
Merge branch 'FlorianRudolf/feature-algorithm-healing' into next
added tolerances for different healing algorithms, added point-triangle intersection healing
new healing algorithm: point-triangle intersection, info outputs, healing algorithm improvements
initialize InputParameter::set
functor concept for evaluating same PLC triangles, support for non-segmented meshes
Merge branch 'FlorianRudolf/feature-algorithm-extract-plc-geometry' into next
Merge branch 'FlorianRudolf/feature-algorithm-geometry-generator' into next
Merge branch 'FlorianRudolf/feature-algorithm-healing' into next