truemail-rb/truemail v0.1.6

on GitHub

Fixed MX gem logic with RFC 7505: https://tools.ietf.org/html/rfc7505

1. Added null MX record supporting, #27
2. Added multihomed MX records supporting, #28
3. Added contributing guideline
4. Updated gem documentation
5. Updated gem wiki
6. Updated gem version to 0.1.6

P.S.: Thanks @AlexeyDemidov for analysis and tips for improvement/correction Truemail MX logic.