Add possibility to create indentpendent Schematycs instances in the world

Hi,

It would be very usefull if Schematycs instances added to level (world) have their own indentpendent of each other values for own components. At the moment change component values via editor in Properties panel for one instance changes values for all of them. I think that such changes should be made only via Schematycs Editor and editing the instance of it in the world via Properties panel should change only components values for this one instance (not for all of them).