Some example scripts illustrating the use of the libmnemosyne API from
within a script.

* export_starts.py: writing stats to a file for post-processing

* add_card.py: adding a card programatically

* find_and_replace.py: finding and replacing text

* export_to_pdf.py: export the latest cards to a pdf file

* import_rosetta_stone.py: import sound and pictures from rosetta stone to
  a sentence card type

* export_to_mp3.py: export today's audio to a single mp3