Create other methods to notify end task

[vitorbritto]

• Beep in terminal (already done)
• Send email (nodemailer module)
• Show growl notification (growl module)

tictac
    .option('-b, --beep', 'beep when task finish')
    .option('-e, --email', 'send email when task finish')
    .option('-g, --growl', 'show growl notification when task finish')

// Notify method
if (cmd.beep) {
    play.sound(done);
}
if (cmd.growl) {
    play.sound(done);
    // use growl module
}
if (cmd.email) {
    play.sound(done);
    // use nodemailer module
}

[raphaelivan]

Growl notification: https://github.com/vitorbritto/tictac/pull/5