Added a basic minitest-handler test
Add test for mail group ownership on ssmtp.conf (required for non-root users to send mail via mail group)
Make the test pass
Merge pull request #10 from trinitronx/fix-non-root-user-cannot-send-mail

Fixed so non-root users in mail group can send mail.
Adjustment to support Debians new default permissions, see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=557948