History:
1.6.3: 28/05/13 O. Sallou - Add comments in grammar
1.6.2: 24/05/13 O. Sallou - Fix overlap+range usage in repeats
1.6.1: 13/03/13 O. Sallou - Show number of match per input seq in stdout
1.6.0: 15/02/13 O. Sallou - Various bug fixes and stability updates
1.5.0: 21/06/12 O. Sallou - Public release
