Doctrine2 : Adding IDENTITY strategy and using strategy user configurati...

Hello johmue,

thanks for this great job that makes me save a lot of time. This is now part of my workflow.
I have found that the user configuration about strategy is not used and in actually hard coded in different schemas.
Here is my modification to make it work with Doctrine 2. I also added the IDENTITY strategy that I needed for my pgsql project.