* Added Hibernate JPA2.0 as persistence provider
* Altered the Song class to be able to have 1 or more Artist
Added constructors

* adds constructors to the Entity calsses
Changed Spring version to 4.0.1-RELEASE
Updates the persistence.xml to more logical settings
Added the save song method with a unit test
Resolving conflicts
Merge branch 'master' of https://github.com/langtall/testing

Conflicts:
	charts/pom.xml
	charts/src/test/java/com/mvhtesting/charts/service/impl/SongServiceImplTest.java