Add some documentation how to install on Fedora/RHEL using yum

DESCRIPTION.rst

@@ -80,6 +80,35 @@ You can also install the in-development version of mpi4py
 
     $ easy_install https://bitbucket.org/mpi4py/mpi4py/get/master.tar.gz
 
+You can also install it directly on Fedora and RHEL (and their derivatives)
+using the epel repository
+
+* using ``yum`` and the ``openmpi`` package on ``x86_64``::
+
+  # yum install mpi4py-openmpi
+
+* using ``yum`` and the ``mpich`` package on ``x86_64``::
+
+  # yum install mpi4py-mpich
+
+Please remember to load the correct module for your choosen mpi environment
+
+* for ``openmpi`` package on ``x86_64`` do::
+
+  $ module load mpi/openmpi-x86_64
+  $ python -c "import mpi4py"
+
+* for ``mpich`` package on ``x86_64`` do::
+
+    $ module load mpi/mpich-x86_64
+    $ python -c "import mpi4py"
+
+  Note however, that the later doesn't work on RHEL (and their derivatives)
+  because of `this bug`_ and you need to manually adjust your ``PYTHONPATH``
+  accordingly.
+
+.. _this bug: https://bugzilla.redhat.com/show_bug.cgi?id=1148992
+
 
 Citations
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