added sinte quote hex to underscore js

Author: vinayshah

lib/web/underscore.js

@@ -1327,7 +1327,8 @@
     '>': '>',
     '"': '"',
     "'": ''',
-    '`': '`'
+    '`': '`',
+    "'": ''',
   };
   var unescapeMap = _.invert(escapeMap);