Added tab registration

django/website/tabbed_page/tab_pool.py

+_pool = {}
+
+
+def register_tab(name, tab):
+    global _pool
+    _pool[name] = tab
+
+
+def get_tab(name):
+    global _pool
+
+    return _pool[name]

django/website/tabbed_page/tests/registration_tests.py

+import pytest
+
+from ..tab_pool import register_tab, get_tab
+
+
+class TestTab(object):
+    pass
+
+
+@pytest.fixture
+def tab():
+    return TestTab()
+
+
+@pytest.mark.django_db
+def test_tab_is_registered(tab):
+    register_tab('test-tab', tab)
+    assert get_tab('test-tab') == tab