Removing unwanted side cases from prefix checks

[BurningWitness]

• Tightened up prefix checks, removing impossible side cases where a downstream prefix is equal to the prefix above, with or without the masking bit.

• Fixed Data.Zebra.Word.fillRange, which broke the aforementioned checks, producing malformed trees in cases like the following:

  fillRange (Range 10 20) White . fillRange (Range 30 40) White $ Mono Black
  
  Bin 00000000000000000000000000000000000000000000000000000000001XXXXX
    Bin 0000000000000000000000000000000000000000000000000000000000011XXX
      Bin 000000000000000000000000000000000000000000000000000000000001XXXX
        Tip 0000000000000000000000000000000000000000000000000000000000001010 => W -- Misplaced
        Tip 0000000000000000000000000000000000000000000000000000000000010101 => B
      Tip 0000000000000000000000000000000000000000000000000000000000011110 => W
    Tip 0000000000000000000000000000000000000000000000000000000000101001 => B

• Version bump to 1.0.0.2.