more answers
answers
merge
answers
reorganisation
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merge
State answers
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Merge branch 'answers' of github.com:tonymorris/course into answers
list zipper answers
Fix move{Left,Right}N answers

The previous version would stack overflow with large values of n,
whereas the new version short circuits as soon as it tries to
exceed the length of the zipper.
Merge pull request #4 from bens/answers

Fix move{Left,Right}N answers
Merge branch 'master' into answers
Cheque writing answers
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Merge branch 'master' into answers
Merge branch 'master' into answers
scala port
Merge branch 'master' into answers