Merge pull request #5 from travisfinch/master

Add DCO information

Author: tianhao64

README.md

@@ -138,6 +138,11 @@ $ ./run_sample.sh ../samples/vsphere/vcenter/setup/main.py -riv
 The API documentation can be found [here] (doc/client.zip)
 
 ## Submitting samples
+
+### Developer Certificate of Origin
+
+Before you start working with this project, please read our [Developer Certificate of Origin](https://cla.vmware.com/dco). All contributions to this repository must be signed as described on that page. Your signature certifies that you wrote the patch or have the right to pass it on as an open-source patch.
+
 ### Required Information
 The following information must be included in the README.md or in the sample docstring in case README already exists in same folder.
 * Author Name