Mailyak Versions Save

Adds support for explicit TLS (#54), and drastically reduces the memory required to send large emails (#55), particularly with attachments.

Thanks to @darnmason for the helpful TLS design input!

Fixes a bug causing emails to be sent with the same timestamp when reusing a MailYak instance (https://github.com/domodwyer/mailyak/issues/50).

Thanks to @jacksgt for both identifying, and fixing the issue!

Updates the Go module path.

Thanks @karelbilek!

Adds Content-ID for all attachments (https://github.com/domodwyer/mailyak/pull/45)

Thanks @soky314 !

Fixes an issue with attachment lengths https://github.com/domodwyer/mailyak/pull/39 (thanks @evangwt)!

Fixes an issue with overly long base64-encoded lines when writing attachments in chunks.

Thanks to @jazzboME for reporting and helping develop a fix!

A release with a couple features and bug fixes:

• Send ccAddrs to the smtp server as RCPT TO addresses - @makiton (#24)
• New AddHeader() to specify arbitrary headers - @deanishe (#27)
• Attach files with specified mime types - @mmmguitar (#28)
• Encode email body as 'quoted-printable' - @cygy (#31)

Thanks for the PRs!

Encodes non-ASCII header characters according to RFC1342.

Thanks to @aandrade1234 for reporting.

Bugfix release - #22

Thanks to @joanbalaguero for the report and @rwhittington for the PR!

Bugfix release - see #18

Thanks to @rickvanbodegraven!