Content Comparison

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Remaining Questions:

1. Is this an approachadequate, clean approach?
2. Should we re-number each changeSet id, because
   1. they are all in the one file
   2. We have removed loads of them
   3. They are now inconsistent and have big gaps in the numbering. e.g. 1-1, 1-2...1-21, 11-1, 11-2, 15, 16, 17, 18, 19, 20, 21