Custom Export for DIN1505 style by Thorsten Bothe

This is a custom export to allow a reference output in DIN1505 conform style. That means e.g. authors in capitals and Book/article title in italic.

This export is not yet complete and some issues cannot be resolved without extension of the internal format modifier. E.g., the last author is separated by '&' which should be a ','.

At least this could be helpful for writing German documents outside TeX (which has working DIN1505 TeX styles) like OO and Word. Some manual postprocessing necessary.
