Added ungleich app to extend Page models.

Ungleich app has a model called UngleichPage,
this model has an attribute called image_header
which will be used to set the background image for
the page header.

Signed-off-by: rscnt <rascnt@gmail.com>

ungleich/models.py

@@ -0,0 +1,12 @@
+from django.db import models
+
+from cms.extensions import PageExtension
+from cms.extensions.extension_pool import extension_pool
+
+
+# Create your models here.
+
+class UngleichPage(PageExtension):
+    image_header = models.ImageField(upload_to='image_header')
+
+extension_pool.register(UngleichPage)