remove VIZ prefix from rendering properties, fix setRenderingProperties and getRenderingProperties methods

delete common.h, viz_types.hpp, rendering properties are public, setcolor in creating_widgets tutorial

Low order tasks

load mesh function is finalized: color range is always 0-255 and RGB due to vtkPLYReader limitations

remove cloudactormap, shapeactormap. only vtkProp is stored and view transformation can be obtained using GetUserMatrix of vtkProp3D

Acess by name infrastructure

fixes based on the feedback: window name prefix is automatically added when it is not there, singleton class returns reference instead of pointer, destructor is private, release function implemented