Added mailerAdapter to work with Nodemailer 1.4

Hi Guy,

Have been poking around with HTTP-status-check since the N Scottsdale meetup and you said to submit pull requests, so here is mine! I wanted to use the emailAdapter but as per the install I got NodeMailer 1.4, and it didn't work. So I've made another adapter that does work.

Thanks, I have learned new things!

Lauren G