Added ShrinkWrap resolver to pom.xml
Added SongManager.updateSong(Song song) and implemented.
Added more configuration to CacheContainerProvider:
 - eviction
 - transaction configuration
 - indexing for hibernate search engine

Some changes in CommentManagerImpl, added Serializable to Song and Comment.
Added hibernate annotaions to Song's field.
Implemented complete test for CommentManager, see CommentManagerImplTest

TODO: Problem with deleting .SST file created by Certificate Store Crypto Shell Extension (Microsoft Corporation). Assume we avoid this by using unix file system.


Signed-off-by: Radek.Koubsky <radekkoubsky@gmail.com>