Seggregate interfaces
Workaround for date functions support PostgreSQL, MySQL and SQLite
Add BirthdayProviderInterface for typehints
Add User and Employee test entities
Fix service manager config key
Refactoring BirthdayRepository
* For now, implements only BirthdaysOfTheDayProviderInterface
* Create a getTargets() method to get all subclasses of AbstractEntity
* Query birthdays of the day from all targets provided by getTargets()
Test BirthdayProvider injection in BirthdayHelper
Problem solved! (or half-solved)
Works with more than one $target
Merge pull request #1 from Danizord/feature/birthdays

Fix the problem of query Birthdays in ORM