grappe-1, first version of grappe, has been written by Gregory
Kucherov long ago, around 1996. This developpement was then suspended
until summer 1999, when Eric Queffelec extended the implementation by
incorporating the possibility of working with bounded-length
wildcards (grappe-2). Then in summer 2000 Sebastien Briais improved
the program by adding many options (multiple choice and complement
caracters, ...), and by testing and debugging the code.
