AliasTableDAO.findAllAliasesByObject implementation

tested
All DAOs should be implemented now

And tested !
Graph can be created to more depth than 1

But its not tested yet. Report bugs pls.
DataSingleton deleted

We dont need it
Warning elimination

removing unused imports
javadoc generating
all except Tables
Merge pull request #16 from PreXident/db-hibernate2

Db hibernate2