Elastishot v0.1.4

Changed

• Same-scale captures are aligned row by row: every row is hashed and the two
  sequences are aligned like lines of text (unique rows as anchors, common
  prefix and suffix, substitutions where nothing is distinctive). An opened
  FAQ answer is an insertion of exactly its height, the rows below it keep
  their pixels, and a table row appended after look-alike rows is never paired
  with the row above it. The 8 px strip alignment stays for resampled pairs
  and for any page where it explains more pixels; the exact-cell count
  arbitrates. On the UI lab this took the regions on elements nobody changed
  from 19 to 1 with all 35 planted changes still found.
• Pairs of the same width up to 1920 px are compared at their own size
  instead of being brought to workingWidth, so a 1440 px capture keeps its
  rows exact below an inserted block.
• A region's density is measured over a box at least 4 px on each side, so a
  border that moved by one pixel no longer scores like a solid block.

Fixed

• Padding that grew or shrank next to a border line produced an "added" or
  "removed" sliver of one or two rows; gaps made only of such slivers are
  padding.
• A run of flat rows at the top or bottom of both captures (page padding)
  no longer anchors the alignment, so a capture that shows less of the page
  than the other is treated as a crop again, not as content that moved.