beta 1:
- removed custom route for filtering and ordering grid columns
- added events to modify source data query building and data hydration
- added column->setAlign('left/right/center')
- support relations in Entity source
- support custom mapping divers
- form type guesser from Source column
- own columns can be added by annotations
- possible registrations of custom column types in container - look at Resources/Config/services
- grid need to be created as service
- annotations
- ODM support