Created by: ly29
sv_set for non StringsSocket now behaves as one might expect, was wrong before... but doesn't use prop_name yet or fancy conversion.
Warning on setting input socket (but still does it), it has no effect.
Debug print node uses deepcopy=False which gives a real view of the datastructure, very useful for further work with turning deepcopy on in many nodes, now datatype was obscured by sv_deep_copy which made a list of all but the deepest level no matter what. Afraid to fix/change that because I think that will expose many problems.