Created by: vicdoval
Numpy implementation achieves over 4x speed. Multi-level matching Old Bmesh implementation left available in the N-panel because the transfer of face data is not identical
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Code changes complete.  - 
Code documentation complete.  - 
Documentation for users complete (or not required, if user never sees these changes).  - 
Manual testing done.  - 
Unit-tests implemented.  - 
Ready for merge.