Update Wolf tutorial with the OBITools3

Wolf-tutorial-with-the-OBITools3.md

@@ -53,6 +53,10 @@ And unzip it:
 
 	obi alignpairedend -R wolf/reads2 wolf/reads1 - > aligned_reads.fastq
 
+We can check the average alignment score (corresponding approximately to the similarity between the sequences in the overlap):
+
+        obi stats -a score_norm wolf/aligned_reads
+
 ### 3. Remove unaligned sequence records
 
 	obi grep -a mode:alignment wolf/aligned_reads wolf/good_sequences