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Changes between Version 1 and Version 2 of ClassVtableOverrides

v1	v2
7	7	For this trick, we need:
8	8
9		* a comprehensive set of VTABLE entries which only dispatch to the given PMC Object's Class's PIR VTABLE override
10		* a way of mapping the name of a VTABLE entry (passed to add_vtable_override()) to the appropriate slot in the fake VTABLE
11		* a way of swapping the standard Object VTABLE for a custom VTABLE for all Object PMCs created by the instantiate() of a Class with overridden VTABLE entries
12		* (likely) a way of identifying whether any parent Class in a Class's MRO has overridden VTABLE entries
	9	* a comprehensive set of VTABLE entries which only dispatch to the given PMC Object's Class's PIR VTABLE override
	10	* a way of mapping the name of a VTABLE entry (passed to add_vtable_override()) to the appropriate slot in the fake VTABLE
	11	* a way of swapping the standard Object VTABLE for a custom VTABLE for all Object PMCs created by the instantiate() of a Class with overridden VTABLE entries
	12	* (likely) a way of identifying whether any parent Class in a Class's MRO has overridden VTABLE entries
13	13
14	14	Thus every time something adds a new VTABLE entry to a Class, add_vtable_override() copies the current object VTABLE, swaps in the appropriate "dispatch to the PIR entry instead" VTABLE entry, and uses that new VTABLE for all Objects instantiated from that Class.