Added mime type to Metadata

Author: coderReview

www/Entry.js

@@ -67,7 +67,8 @@ Entry.prototype.getMetadata = function(successCallback, errorCallback) {
     var success = successCallback && function(entryMetadata) {
         var metadata = new Metadata({
             size: entryMetadata.size,
-            modificationTime: entryMetadata.lastModifiedDate
+            modificationTime: entryMetadata.lastModifiedDate,
+            type: entryMetadata.type
         });
         successCallback(metadata);
     };

www/Metadata.js

@@ -28,9 +28,11 @@ var Metadata = function(metadata) {
     if (typeof metadata == "object") {
         this.modificationTime = new Date(metadata.modificationTime);
         this.size = metadata.size || 0;
+        this.type = metadata.type || '';
     } else if (typeof metadata == "undefined") {
         this.modificationTime = null;
         this.size = 0;
+        this.type = null;
     } else {
         /* Backwards compatiblity with platforms that only return a timestamp */
         this.modificationTime = new Date(metadata);