No-reference score readout tool

A dependency-free (pure standard-library) Python tool that reads NO-REFERENCE (blind) video-quality scores honestly for the live and UGC cases. It does four things and never decodes video: (1) MAPS a raw NR-model output onto the 1-5 MOS scale with the ITU-T P.1401 monotonic logistic and attaches a confidence BAND = z*RMSE from the model's validation RMSE; (2) A/B COMPARES two clips and REFUSES to declare a winner when the bands overlap or the difference is inside z*RMSE*sqrt(2) (the no-reference