add superkingdom and improve performances

Closes #23 add missing commits to master

backend/metagenedb/apps/catalog/admin/taxonomy.py

@@ -7,7 +7,7 @@ from metagenedb.apps.catalog.models import Taxonomy
 class TaxonomyAdmin(admin.ModelAdmin):
 
     list_display = (
-        'tax_id', 'name', 'rank',
+        'tax_id', 'name', 'rank', 'superkingdom',
         'kingdom', 'phylum', 'class_rank', 'order', 'family', 'genus', 'species',
     )
     search_fields = ('tax_id', 'name')