Fixed bugs
1) Retun empty list insted of null
2) EMF clean up issue
3) Transitive persistence issue
4) Schema Generation issue
and some refactored code
Added some test cases and entities
Fixed some test cases
Merge branch 'trunk' of github.com:impetus-opensource/Kundera into trunk
Merge branch 'trunk' of github.com:impetus-opensource/Kundera into trunk