MongoDB 3.0.0 driver compatibility

the new java driver MongoDB 3.0.0 will be out soon.

It's compatible with previous version if you don't use deprecated method/class (that will be deleted). 

Jongo use some of this methods. (example : DuplicateKey will becomes DuplicateKeyException).

This pull request is not the FULL changeset to support the 3.0.0 driver. It's just to reminder to update jongo code.