Add App registry app

apps/app_registry/api.py

@@ -0,0 +1,21 @@
+from __future__ import absolute_import
+
+from django.db import DatabaseError, transaction
+
+from .models import App
+from .links import app_registry_tool_link
+
+
+@transaction.commit_on_success
+def register_app(name, label, icon=None):
+    try:
+        app, created = App.objects.get_or_create(name=name)
+    except DatabaseError:
+        transaction.rollback()
+        return None
+    else:
+        app.label = label
+        if icon:
+            app.icon = icon
+        app.save()
+        return app