update elements and fix some bugs

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

Index: lib/src/paper-input/paper-input.html
diff --git a/lib/src/paper-input/paper-input.html b/lib/src/paper-input/paper-input.html
index ffd06b8224f1f5b3a236560bab19291a29aa0471..a6b99278bc82de52fb11a26bb56a1f07981a2499 100644
--- a/lib/src/paper-input/paper-input.html
+++ b/lib/src/paper-input/paper-input.html
@@ -16,6 +16,8 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
 <link rel="import" href="paper-input-char-counter.html">
 
 <!--
+Material design: [Text fields](https://www.google.com/design/spec/components/text-fields.html)
+
 `<paper-input>` is a single-line text field with Material Design styling.
 
     <paper-input label="Input label"></paper-input>
@@ -35,6 +37,15 @@ for `suffix`).
       <paper-icon-button suffix icon="clear"></paper-icon-button>
     </paper-input>
 
+A `paper-input` can use the native `type=search` or `type=file` features.
+However, since we can't control the native styling of the input, in these cases
+it's recommended to use a placeholder text, or `always-float-label`,
+as to not overlap the native UI (search icon, file button, etc.).
+
+    <paper-input label="search!" type="search"
+        placeholder="search for cats" autosave="test" results="5">
+    </paper-input>
+
 See `Polymer.PaperInputBehavior` for more API docs.
 
 ### Styling
@@ -106,7 +117,11 @@ style this element.
         size$="[[size]]"
         autocapitalize$="[[autocapitalize]]"
         autocorrect$="[[autocorrect]]"
-        on-change="_onChange">
+        on-change="_onChange"
+        autosave$="[[autosave]]"
+        results$="[[results]]"
+        accept$="[[accept]]"
+        multiple$="[[multiple]]">
 
       <content select="[suffix]"></content>