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Allow specifying read/write method parameters in adios_reorganize

Podhorszki, Norbert requested to merge github/fork/keichi/reorganize-params into master

Created by: keichi

adios_reorganize --help says read/write method parameters can be specified through command line argument, but it's not implemented.

Usage: adios_reorganize input output rmethod "params" wmethod "params" <decomposition>
    input   Input stream path
    output  Output file path
    rmethod ADIOS method to read with
            Supported read methods: BPFile, HDF5, SST, DataMan, InSituMPI
    params  Read method parameters (in quotes; comma-separated list)
    wmethod ADIOS method to write with
    params  Write method parameters (in quotes; comma-separated list)
    <decomposition>    list of numbers e.g. 32 8 4
            Decomposition values in each dimension of an array
            The product of these number must be less then the number
            of processes. Processes whose rank is higher than the
            product, will not write anything.
               Arrays with less dimensions than the number of values,
            will be decomposed with using the appropriate number of
            values.

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