Added wien2k 13/14 support

Added support for wien2k 13/14 as well as added extra configuration options for the parallel_options file.
OK, let's do this proper with the exceptions:
- if `$SCRATCH` or `self.cfg['SCRATCH']` is set, use it as a location for `mkdtemp`
- if not set, call `mkdtemp` without arguments. It will pick a proper location by itself (we set it in the `main`).