change license to BSD-2-Clause-Patent. README.md: fix some typos. lib_score.js: fix wrong hacking level comparison that prevented script from working properly in early game.

Created by  nicoty  on August 30, 2020
6PAXZMAIQNBD7GQDSQVF7NI2UW3GSPBL6UOUXGLLEVI4LJ6YMK2AC
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