Merged regressiontests and modeltests into the test root.

tests/proxy_model_inheritance/app1/models.py

@@ -0,0 +1,9 @@
+from __future__ import absolute_import
+
+# TODO: why can't I make this ..app2
+from app2.models import NiceModel
+
+
+class ProxyModel(NiceModel):
+    class Meta:
+        proxy = True