Adding interfaces modules. This has been slightly altered from the or…

…iginal grok version, to have orderedcontainer implement IContext

src/grokcore/content/interfaces.py

@@ -0,0 +1,14 @@
+# -*- coding: utf-8 -*-
+
+from grokcore.component.interfaces import IContext
+from zope.container.interfaces import IOrderedContainer
+from zope.container.interfaces import IContainer as IContainerBase
+
+
+class IContainer(IContext, IContainerBase):
+    """A Grok container.
+    """
+
+class IOrderedContainer(IContainer, IOrderedContainer):
+    """A Grok container that can be ordered.
+    """