Auryn simulator

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====== Simulator Init ======

Whenever using Auryn you will be required to place the following code in your main program, which initializes the global objects
<code c++>
    // BEGIN Auryn Init
    mpi::environment env(ac, av);
    mpi::communicator world;
    communicator = &world;
    logger = new Logger(logfile,world.rank());
    sys = new System(&world);
    // END Auryn Init
</code>
where I assumed that the string ''logfile'' was declared before and should for clarity reasons point to a file with file extension ''log''. This snipped of init code frist sets up the [[Boost]] MPI libraries and namely the communicator under the global handle ''world''. It then creates the ''logger'' of type [[Logger]] and then initializes the global variable ''sys'' of type [[System]]. The two objects manage the interactions of all Auryn objects which are defined consequently. They are therefore required to exist under the names ''logger'' and ''sys'' before any of the simulator code is run.