additional check

- TransVer now checks for spurious "correct" alignments, where number of tokens
  matches but words are aligned with non-word symbol tokens
incremented version to v0.4.0
added checks, troubleshooted some others

- now, non-letter symbols shared across tiers must match in two tokens -- e.g.
  hesitation markers @, parentheses etc.
comparing ort and fon tokens

- parentheses () now need not match between tiers -- they don't matter that much