0.22 2016-06-03
        - Spans now always wrap terms (diewald)
	- Cosmas-II "und", "oder", and "nicht" operations
	  now serialize to unordered sequences (diewald)

0.21 2015-10-27
        - Improved meta query builder (hanl)

0.2 2015-06-25
        - Switch to "koral:" prefix (bingel)
	- Coverage of KoralQuery 0.3
	  (see http://korap.github.io/Koral/)
          (bingel)

0.1 2015-02-10
        - First version published to GitHub (bingel)