Merge pull request #7 from inxilpro/master

Add 'envelopeFrom' and 'envelopeTo' fields to parsedEmail
Update README.md
Version bump
Merge pull request #10 from inxilpro/master

More robust tests of envelope
Merge pull request #12 from inxilpro/master

Implements HTML to text via the "html-to-text" module
Bump to 0.1.0 - html-to-text and envelope from @inxilpro
Add smtpOptions to Mailin ctor options.

Version bump. Closes #13.