Django-scripts.md

@@ -56,12 +56,14 @@ build_hierarchy | Build hierarchy for taxonomy entries.
 
 ###### General rules
 
+You have all the base classes you need in `metagenedb.backend.metagenedb.apps.catalog.management.commands.commons` to help you build your script parts to imports genes from any catalogs. Please look at the example for Virgo and IGC to have two examples of use of theses classes.
+
 ###### IGC
 
 Script | description
 ------ | -----------
 import_igc_annotation | Create or update IGC genes from IGC annotations file
-import_igc_sequences | Add IGC gene sequences to corresponding genes
+import_igc_sequences | Add IGC gene sequences to corresponding genes (need genes first)
 
 ###### Virgo