0.2.0.0: 20161211
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* Upgrade diagrams version.
* Add various new puzzle types.
* Add solution code markers.
0.1.0.4: 20141115
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* add installation and usage instructions to README
* merge puzzle-draw-cmdline
* update for diagrams 1.2 and ghc 7.8
* add new puzzle types: Bahnhof, Cave
* rename `countnumbers` to `meanderingnumbers`
* include and use a nicer font
* command-line option to list supported puzzle types
* various tweaks and fixes
0.1.0.3: 20140519
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* add new puzzle types: Maximal Lengths, Prime Place, Magic Labyrinth
0.1.0.2: 20140419
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* add new puzzle types: Japanese Sums, Coral
0.1.0.1: 20140409
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* add new puzzle type: Tapa
0.1.0.0
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* first release