Add locale

Add locale
Translate title
Merge global context in view contexts
Prevent error when translate key is not set
Restrict alternate and canonical link to view context
Add confirm and edit feature
Change recover to handle link with mail, pass and hash directly
Remove recoverMail action
Change register to generate a mail with confirmation link
Confirm now create user and fill extra fields or guess them form mail
Register log new user in emergency log with mail, locale and confirm
Remove flatten moved to Rapsys\PackBundle\Util\SluggerUtil