anchor.diff:  
   * PDielec/ is the home directory and contains the `pdielec` and `preader` commands
   * PDielec/Python holds the source for the modules used by the pdielec and preader commands
  +* PDielec/Python/PyMieScatt holds a customised version of the PyMieScatt code downloaded from https://github.com/bsumlin/PyMieScatt.  Thanks to Benjamin Sumlin for making this available
   * PDielec/Examples a set of examples are available for Abinit, Crystal14, CASTEP, GULP, Phonopy, Mie and VASP.  Each example directory holds the input files to the QM/MM program and the relevant output files which are post processed by PDielec.  For each program there is also a preader directory which holds test output for the preader command.
   
   === Examples
  
positive.code:  pip install scipy
   pip install matplotlib
   pip install PyYaml
   pip install PyMieScatt
   pip install XlsxWriter
   pip install termcolor
  
  
negative.code: ==== Anaconda
  Anaconda is a Python package manager and is useful when trying out different versions of Python as there is a very convenient environment manager.  Anaconda can be installed as a user program and so root access to the computer is not needed.  The software can be downloaded from https://conda.io/miniconda.html or https://www.anaconda.com/download/.  Unless you are interested in the full package the miniconda installation should be sufficient for installing the rest of the modules needed for the PDielec installation.
  
  As an example here is an installation using a Python 2.7 environment.  Using 'pip install' means that the anaconda build system is bypassed.ld system in Anaconda normally makes sure only compatible software versions are installed, but this seems to cause problems in this case. 
  
  
     conda create  --name pdielec2 python=2
  