add hibrenate-core 4.3.6 config files
add slf4j and log4j2 config
add Hibernate base junit test case
add embedded component (@Embeddable/@AttributeOverride)
add many to many bidirectional associations (@ManyToMany/@JoinTable)
add many to many unidirectional associations (@ManyToMany/@JoinTable)
add one to one uidirectional associations (@OneToOne/@JoinColumn(unique = true))