Added Tresorit service
Added Tresorit service

Tresorit service was added to list. Its' security is superior to SpiderOak One Backup (https://tresorit.com/business/spideroak-alternative).

ScheerMT/OS-X-Yosemite-Security-and-Privacy-Guide,drduh/OS-X-Yosemite-Security-and-Privacy-Guide,drduh/OS-X-Security-and-Privacy-Guide,drduh/macOS-Security-and-Privacy-Guide