A class representing calculation of Franck-Condon factors using ``fcf`` program.
Two new attributes are introduced: ``inputjob1`` and ``inputjob2``. They are used to supply KF files from previous runs to ``fcf`` program. The value can either be a string with a path to KF file or an instance of any type of |SCMJob| or |SCMResults| (in this case the path to corresponding KF file will be extracted automatically). If the value of ``inputjob1`` or ``inputjob2`` is ``None``, no automatic handling occurs and user needs to manually supply paths to input jobs using proper keywords placed in ``myjob.settings.input`` (``STATES`` or ``STATE1`` and ``STATE2``).
The resulting ``TAPE61`` file is renamed to ``jobname.t61``.