Make RequestImpl.toString also print params

Author: Stephane Landelle

api/src/main/java/com/ning/http/client/RequestBuilderBase.java

@@ -293,12 +293,20 @@ public String toString() {
 
             sb.append("\t");
             sb.append(method);
+            sb.append("\theaders:"
             for (String name : headers.keySet()) {
                 sb.append("\t");
                 sb.append(name);
                 sb.append(":");
                 sb.append(headers.getJoinedValue(name, ", "));
             }
+            sb.append("\tparams:"
+            for (String name : params.keySet()) {
+                sb.append("\t");
+                sb.append(name);
+                sb.append(":");
+                sb.append(params.getJoinedValue(name, ", "));
+            }
 
             return sb.toString();
         }