Initial project setup
Add CXF based REST service
Decrease required Java version to 1.6.
Add Maven dependencies for persistence

dependencies are added for 
- javax.persistence (JPA API)
- eclipselink (JPA implementation)
- apache DBCP (basic datasource)
- derby ([in-memory] database)

Signed-off-by: Adrian Goerler <adrian.goerler@sap.com>