• A new compare API. The new Compare class no longer takes the datasets and
  pairs as arguments. The actual computation is now performed when calling
  .compute(PAIRS, DF1, DF2). The documentation is updated as well, but
  still needs improvement.
• Two new string similarity measures are added: Smith Waterman
  (smith_waterman) and Longest Common Substring (lcs). Thanks to Joel Becker
  and Jillian Anderson from the Networks Lab of the University of Waterloo.
• Added and/or updated a large amount of unit tests.
• Various small improvements.