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Version History:

 2.9 2012-11-06 fix bug in nullSafeStringCompare. It was ignoring case.

 3.0 2014-04-29 add quoteForReplace to quote Regex replacement Strings,
                stripNaughtyCharacters, reorderLetters, deDupLetters

 3.1 2016-02-22 add last and tail methods

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