Updated Service Widgets (markdown)

Service-Widgets.md

@@ -176,6 +176,19 @@ widget:
 ```
 
 
+## Transmission
+
+Uses the same username and password used to login from the web.
+
+```yaml
+widget:
+  type: transmission
+  url: http://transmission.host.or.ip
+  username: username
+  password: password
+```
+
+
 # Networking Utilities
 
 Includes things like proxy managers, DNS providers and network statistics.