Develop utility command line script to read single cif and write coordinate files/images etc.

What

• Want a command line script so a user can read in any ccd cif and
  • write a sdf if they want to - with options for ideal/model coordinates, hydrogen, alias on off
  • write a pdb file with options ...
  • write an image with options ....
• Display properties about the molecule - lipinski things - num rings, rotable bonds etc. etc.

How

• The command line arguments and the help text for each must be proposed as a comment on this page. The proposal must be agreed to before any coding is done!
• Script is to use argparse
• All points except 2 in https://ajminich.com/2013/08/01/10-things-i-wish-every-python-script-did/ must be followed.
• Can you unit test a command line script?
• If there are exceptions (file does not exist etc.) catch them produce a sensible error message to the user and call sys.exit(1) to indicate to the calling process there was problem.