Update index.md

Adding link to security and trust documentation.

Author: Greg Meyer

index.md

@@ -27,7 +27,7 @@ The reference implementation adopts a modular design for easy asset reuse and ex
 
 ### Java Components
 * [Commons Library](http://api.directproject.info/direct-common/6.0/)
-* Security And Trust Agent
+* [Security And Trust Agent](https://directprojectjavari.github.io/agent/)
 * Gateway
 * [Message Monitoring](https://directprojectjavari.github.io/direct-msg-monitor/)
 * [Policy Enablement](https://directprojectjavari.github.io/direct-policy/)