Addition of Matrix Input-Output format
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                 Key: HADOOP-2515
                 URL: https://issues.apache.org/jira/browse/HADOOP-2515
             Project: Hadoop
          Issue Type: New Feature
          Components: mapred
            Reporter: Edward Yoon
            Assignee: Edward Yoon
            Priority: Minor


After talk with gary bradski, i decided to try working for matrix.
If you have any advice, please let me know.

* A matrix of features
** Each row is one input vector.
** Each column coreesponds to a separate feature. 
*** indicates the i-th row vector

* Splitting the input matrix
** The input matrix is split into n submatrix, where n is the number of mapper.
** Computation is are on input vectors; only 1-D decomposition is done.


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