Move dht.go to glog
Change the DHT bootstrapping nodes.

Bootstrappers have been unreliable. Make changes based on the DHT Monitoring project:
http://dsn.tm.kit.edu/english/2936.php

- router.utorrent.com is unstable and has been down for several days [REMOVED].
- router.bittorrent.com seems more reliable [ADDED].
- dht.transmissionbt.com is less reliable but sometimes works [ADDED]