Merge pull request #56 from xiaopeng163/master

modify the url link address in README.md

Author: Jonathan Wayne Parrott

README.md

@@ -1,6 +1,6 @@
 ## Google Cloud Platform Python Samples
 
-This repository holds the samples used in the python documentation on [cloud.google.com](cloud.google.com).
+This repository holds the samples used in the python documentation on [cloud.google.com](https://cloud.google.com).
 
 [![Build Status](https://travis-ci.org/GoogleCloudPlatform/python-docs-samples.svg)](https://travis-ci.org/GoogleCloudPlatform/python-docs-samples)
 [![Coverage Status](https://coveralls.io/repos/GoogleCloudPlatform/python-docs-samples/badge.svg)](https://coveralls.io/r/GoogleCloudPlatform/python-docs-samples)