Fixed overload of bootstrap and JS library
Add mailer UserMailer for email notifications
Add welcome_mail method for mailer, welcome_mail HTML template and devise controller to customize them
Devise create method from controller customized to send email after registration
Add configuration file to send email from sezama08@gmail.com
Add letter_opener, problem in popup on browser
Fixing conflict with letter_opener, it doesn't work yet
Add email notification for matching