SplitInput should support randomizing the input
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                 Key: MAHOUT-904
                 URL: https://issues.apache.org/jira/browse/MAHOUT-904
             Project: Mahout
          Issue Type: Improvement
            Reporter: Grant Ingersoll
            Assignee: Grant Ingersoll


For some learning tasks, we need the input to be randomized (SGD) instead of 
blocks of labels all at once.  SplitInput is a useful tool for setting up 
train/test files but it currently doesn't support randomizing the input.

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