Format From, To, Cc & Bcc for RFC1342 (jordan-wright#115)

* Format From, To, Cc & Bcc for RFC1342

* Fixed seperator & added tests

Pool accepting specific tls.Config (jordan-wright#53)

Added stripping of whitespace at the beginning of emails when importi…

…ng from a reader.

Adding GoDoc button

Fixing README formatting

Merge pull request jordan-wright#14 from ichinaski/master

'Q' encode non US-ASCII header values(RFC 2047)

Merge pull request jordan-wright#12 from mjibson/master

Set Content-ID on attachments