update elements and fix some bugs

lib/src/paper-input/paper-textarea.html

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 <link rel="import" href="../polymer/polymer.html">
@@ skipping 27 matching lines @@
         display: block;
       }
     </style>
 
     <paper-input-container no-label-float$="[[noLabelFloat]]" always-float-label="[[_computeAlwaysFloatLabel(alwaysFloatLabel,placeholder)]]" auto-validate$="[[autoValidate]]" disabled$="[[disabled]]" invalid="[[invalid]]">
 
       <label hidden$="[[!label]]">[[label]]</label>
 
       <iron-autogrow-textarea id="input" class="paper-input-input"
         bind-value="{{value}}"
+        disabled$="[[disabled]]"
         autocomplete$="[[autocomplete]]"
         autofocus$="[[autofocus]]"
         inputmode$="[[inputmode]]"
         name$="[[name]]"
         placeholder$="[[placeholder]]"
         readonly$="[[readonly]]"
         required$="[[required]]"
         maxlength$="[[maxlength]]"
         autocapitalize$="[[autocapitalize]]"
         rows$="[[rows]]"
@@ skipping 60 matching lines @@
 
     _ariaLabelledByChanged: function(ariaLabelledBy) {
       this.$.input.textarea.setAttribute('aria-labelledby', ariaLabelledBy);
     },
 
     _ariaDescribedByChanged: function(ariaDescribedBy) {
       this.$.input.textarea.setAttribute('aria-describedby', ariaDescribedBy);
     }
   });
 </script>