Added America instance on 3.tracker.eu.org

To make the latency less for those who is on America, we added another project that caters on people that is living on America on https://3.tracker.eu.org/announce.

Tracker is now on eu.org domain!

The tracker was moved again to the new domain tracker.eu.org and atrack.eu.org.
The domain was requested on December 29, 2018 and approved by the eu.org webmasters on January 4, 2019. It takes 6 days to approve the domain.
Special thanks to the eu.org webmasters for approving our domain.