Fixes

svornostrequested to merge
svornost/fc-pregmod:fixes into pregmod-master
  1. Clean up sanity check a little bit (ignore only-used-once in backwardsCompatibility.js and purge some deleted stuff from the ignore list).
  2. Remove game state initialization of $childToSlave since it's never used
  3. Fix some overzealous print replacements (don't write doThing(<<= getSlave($AS).property)>>) when doThing(getSlave($AS).property)) works fine).

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