support experimental flag for metadatahash

src/app/contract/contractParser.js

@@ -47,6 +47,9 @@ var getDetails = function (contractName, contract, source) {
 
 var retrieveMetadataHash = function (bytecode) {
   var match = /a165627a7a72305820([0-9a-f]{64})0029$/.exec(bytecode)
+  if (!match) {
+    match = /a265627a7a72305820([0-9a-f]{64})6c6578706572696d656e74616cf50037$/.exec(bytecode)
+  }
   if (match) {
     return match[1]
   }