Changed mailing method to :sendmail
Revert "Changed mailing method to :sendmail"

This reverts commit dc2c68593bbae1198269f64ce70c72998c43b55f.
Moved confidential data to environment variables
Use GMAIL_SMTP_DOMAIN to customize smtp domain
Security upgrade of Rails
Moved SMTP address and port to ENV
Added script to start fake SMTP server (mailtrap)
Temporary workaround for 2.3.15 update
Merge branch 'master' into dev