Move navigation app classes to a separate classes file

apps/common/__init__.py

@@ -12,9 +12,9 @@ from django.conf import settings
 from django.db.models.signals import post_save
 from django.contrib.auth.models import User
 
-from navigation.api import bind_links, register_top_menu, Link
+from navigation import Link
+from navigation.api import bind_links, register_top_menu
 from project_setup.api import register_setup
-#from project_tools.api import register_tool
 
 from .settings import (AUTO_CREATE_ADMIN, AUTO_ADMIN_USERNAME,
     AUTO_ADMIN_PASSWORD, TEMPORARY_DIRECTORY)

apps/common/links.py

@@ -1,6 +1,6 @@
 from django.utils.translation import ugettext_lazy as _
 
-from navigation.api import Link
+from navigation import Link
 
 from .icons import (icon_password_change, icon_current_user_details, icon_current_user_edit,
     icon_about, icon_license, icon_admin_site)