update README

.gitignore

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+.DS_Store

README.md

@@ -11,8 +11,10 @@ DHT implements the bittorrent DHT protocol in Go. Now it includes:
 
 It contains two modes, the standard mode and the crawling mode. The standard
 mode follows the BEPs, and you can use it as a standard dht server. The crawling
-mode aims to spide as more medata info as possiple. It doesn't fllow the
-standard BEPs protocol.
+mode aims to spide as more medata info as possiple. It doesn't follow the
+standard BEPs protocol. With the crawling mode, you can build another Pirate Bay.
+
+[bthub.io](http://bthub.io) is a BT search engine based on the crawling mode.
 
 ## Install