Summary of changes for mpi 3.1.0:
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 * Compatibility with Octave 5.1.0 or later

Summary of changes for mpi 2.0.0, 2.2.0 and 2.2.1:
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 * Changed structure of library, to improve compatibility with
   Octave 4.4.x, at least 4.4.0 is now required.

 * Adapted user defined classes to new interpreter.

 * Fixed variable types to work with --enable-64 which
   is now default.

 * Added MPI_COMM_WORLD

Summary of changes for mpi 1.2.0:
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 * Changed Makefile to allow specifying MPI compile and link options
   via environment variables.

 * Fixed a memory leak bug.

Summary of changes for mpi 1.1.1:
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 * Package name changed.

 * Patched the MPI_(I)Probe function that was incompatible with newer versions of openmpi.

 * This version of the package should work with distributions of mpi other than openmpi,
   not testing has been done yet, though.

Summary of changes for openmpi_ext 1.1.0:
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 * Added help text and demos in all example scripts

 * Code clean-up and standardization, and some bug-fixes

