Restructure jclouds-chef project

Refactor jclouds-chef according to the new project structure (as done in jclouds-labs):

• Move pom configuration from project/pom.xml to root pom.xml
• Remove project and resources modules
• Create a new exanmple "chef-gae" in jclouds-examples
• Move servlet and demos projects to the "chef-gae" example
• Move constants and stuff in core that are only used in the gae example to the "chef-gae" example project.