Update lang::find()

Bug fix when arguments passed are arrays
Update lang::__construct

Automatic creation of langage files
Debug bar : refactorisation + templating
Debug bar : refactorisation + templating
Update lang::find : Recording var availables in lang code
delete test
Error tracking
Installation process
Update class mail

Send strict mime-type mail
Update mail::to() : Accept array of emails
enhanced JS cropbox
added swiftMailer support