CDK-595: Added a note in the README.md requiring CDH5

Closes #12.
CDK-597:  Update stable examples for version 0.16.0
CDK-597:  Update snapshot examples for version 0.16.1-SNAPSHOT
CDK-575: Update parent pom to CDH5 app parent.

 * This also includes fixes needed to work post CDK-140.

Closes #13