The SimpleCsvExamples didn't really parsed the double correctly with the 
FastLine and FastLineReader
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                 Key: MAHOUT-677
                 URL: https://issues.apache.org/jira/browse/MAHOUT-677
             Project: Mahout
          Issue Type: Bug
          Components: Examples
    Affects Versions: 0.5
            Reporter: Stanley Xu
            Priority: Minor
             Fix For: 0.5
         Attachments: simplecsvexamplebugfix.diff

The FastLineReader in SimpleCsvExamples.java try to parse the line quickly 
through parse the bytes directly from the stream without the cost of copy 
Strings. But it didn't parse the line correctly and will get all double values 
as zero in fast parsing mode

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