Support fallback function for contracts

assets/js/universal-dapp.js

@@ -171,6 +171,15 @@ UniversalDApp.prototype.getInstanceInterface = function (contract, address, $tar
         }
         $instance.append( $title );
 
+        // Add the fallback function
+        $instance.append(self.getCallButton({
+            abi: { constant: false, inputs:[], name: '(fallback)', outputs: [], type: 'function' },
+            encode: function(args) {
+              return '';
+            },
+            address: address
+        }));
+
         $.each(abi, function(i, funABI) {
             if (funABI.type != 'function') return;
             // @todo getData cannot be used with overloaded functions