Added @media CSS rules to remove dupe ©

Resolves GoogleWebComponents#423

Author: KeithHenry

google-map.html

@@ -76,6 +76,20 @@
         bottom: 0;
         left: 0;
       }
+        
+      @media print { 
+        .gm-style .gmnoprint, 
+        .gmnoprint {
+          display:none  
+        }
+      }
+      
+      @media screen {  
+        .gm-style .gmnoscreen, 
+        .gmnoscreen {    
+          display:none  
+        }
+      }
     </style>
 
     <google-maps-api