Issue #56 Enforce Timestampable behavior using doctrine lifecycle events
Result of "php-cs-fixer fix src/Elcodi"

* All are minor format issues
Issue #3 Newsletter bundle

* Migrated all data placed previously in UserBundle related to newsletter to new Bundle
* Deleted Customer element from NewsletterSubscription to uncouple both bundles
* Tested all Bundle
* Created entity definition with all mapping definition