Merge pull request #26 from modulargaming/3.3/master

Update SwiftMailer
Merge branch '3.3/master' into 3.3/develop
Merge branch '3.3/master' into 3.3/develop
Remove swiftmailer submodule, switch to all Composer
Bump version
Merge branch '3.3/develop' into 3.3/master

Release version 1.0.1