Two changes

Changes for KK to be merged into mainline pylibopenflow
Changed show to return a string.
diff --git a/tools/pylibopenflow/bin/pyopenflow-pythonize.py b/tools/pylibopenflow/bin/pyopenflow-pythonize.py
index 466c35d..97b7c8f 100755
--- a/tools/pylibopenflow/bin/pyopenflow-pythonize.py
+++ b/tools/pylibopenflow/bin/pyopenflow-pythonize.py
@@ -7,6 +7,7 @@
 Date December 2009
 """
 import sys
+#@todo Fix this include path mechanism
 sys.path.append('./bin')
 sys.path.append('./pylib')
 import getopt