Initial commit of the AENET code.

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            Python interface to the symmetry function module
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Prerequisites:

  Python 2.7
  Cython


Installation:

(1) Compile the symmetry function C library in ../src

$ cd ../src
$ make -f ./makefiles/Makefile.XXX lib
$ cd -

Select the Makefile.XXX that is appropriate for your system.

(2) Build Python extension module

$ python setup.py build_ext --inplace