The proxify layer should hide itself in stack traces

[mmomtchev]

When throwing a Python exception from a proxified Python object back to the user, the proxify layer, ideally, should hide itself in the stack trace so that the user can immediately see the origin of the exception in his code.

[mmomtchev]

Alas, there is no standard solution to this problem in the JS excosystem.

The solution that Node.js implements internally is rather complex.