Use https://github.com/eleith/emailjs instead of nodemailer for control of headers
Add support for tabs and any whitespace in folded header per https://github.com/andris9/mailcomposer/issues/19
in logAll module, use case-insensitive headers
add test for tab folded header for test.js. Should work with nodemailer, but not until https://github.com/andris9/mailcomposer/issues/19 is fixed and rolled into nodemailer