Added a setToken() that takes a boolean, as it can be very convenient.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3668 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/crowd/data/TokenRing.java

@@ -73,6 +73,18 @@ public class TokenRing extends SimpleStreamableObject
         return _tokens;
     }
 
+    /**
+     * Set the specified token to be on or off.
+     */
+    public void setToken (int token, boolean on)
+    {
+        if (on) {
+            setToken(token);
+        } else {
+            clearToken(token);
+        }
+    }
+
     /**
      * Adds the specified token to this ring.
      */