move ifupdown2/* .

ifupdown2 code was one level deeper because ifupdown2 initially
had ifupdown2 and ifupdown2-addons as two separate packages.
Since they were combined into one package, it makes sense to
move all combined code under the top level directory

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>

ifupdown/exceptions.py

@@ -0,0 +1,23 @@
+#!/usr/bin/python
+#
+# Copyright 2014 Cumulus Networks, Inc. All rights reserved.
+# Author: Roopa Prabhu, roopa@cumulusnetworks.com
+#
+# ifupdown --
+#    exceptions
+#
+
+class Error(Exception):
+    """Base class for exceptions in ifupdown"""
+
+    pass
+
+class ifaceNotFoundError(Error):
+    pass
+
+
+class invalidValueError(Error):
+    pass
+
+class errorReadingStateError(Error):
+    pass