Merge pull request #877 from sr-verde/phpmailer6

Upgrade PHPMailer to v6.0

Merge pull request #626 from panique/develop

Develop

Merge pull request #606 from panique/develop

Develop

Merge pull request #576 from panique/develop

affiliate support link

Update README.md

Merge pull request #560 from cybernet/patch-1

add Gitter iM badge

Merge pull request #415 from panique/develop

Develop

Merge pull request #339 from panique/develop

changelog update

donate/support update