registration implemented

Main/models/__init__.py

@@ -0,0 +1,10 @@
+from Main.models.userinfo import UserInfo
+from Main.models.group import Group
+from Main.models.task import Task
+from Main.models.file import File
+from Main.models.set import Set
+from Main.models.subscription import Subscription
+from Main.models.settask import SetTask
+from Main.models.solution import Solution
+from Main.models.language import Language
+from Main.models.extrafile import ExtraFile