Add clustering app

apps/clustering/permissions.py

@@ -0,0 +1,8 @@
+from __future__ import absolute_import
+
+from django.utils.translation import ugettext_lazy as _
+
+from permissions.models import PermissionNamespace, Permission
+
+namespace = PermissionNamespace('clustering', _(u'Clustering'))
+PERMISSION_NODES_VIEW = Permission.objects.register(namespace, 'nodes_view', _(u'View the nodes in a Mayan cluster'))