Formatting and remove ref to converse

Author: jcbrand

README.markdown

@@ -17,10 +17,8 @@ object.
 
 For example, here the "roster" plugin is used:
 
-``
-    var connection = new Strophe.Connection(converse.bosh_service_url);
-    connection.roster.get(function () {});
-``
+``var connection = new Strophe.Connection(bosh_service_url);```
+``connection.roster.get(function () {});```
 
 ## Available Plugins