update elements and fix some bugs

lib/src/paper-styles/paper-styles.html

Index: lib/src/paper-styles/paper-styles.html
diff --git a/lib/src/paper-styles/paper-styles.html b/lib/src/paper-styles/paper-styles.html
index 1e4fce59f75b60625bd38f015223344431ab8d58..7bee9dd639529d22cc0997b4b0c7499c9e27ccc9 100644
--- a/lib/src/paper-styles/paper-styles.html
+++ b/lib/src/paper-styles/paper-styles.html
@@ -11,6 +11,30 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
 <link rel="import" href="../iron-flex-layout/iron-flex-layout.html">
 <link rel="import" href="../iron-flex-layout/classes/iron-flex-layout.html">
 
+<!--
+The `<paper-styles>` component provides simple ways to use Material Design CSS styles
+in your application. The following imports are available:
+
+1. [color.html](https://github.com/PolymerElements/paper-styles/blob/master/color.html):
+a complete list of the colors defined in the Material Design [palette](https://www.google.com/design/spec/style/color.html)
+
+2. [default-theme.html](https://github.com/PolymerElements/paper-styles/blob/master/default-theme.html): text,
+background and accent colors that match the default Material Design theme
+
+3. [shadow.html](https://github.com/PolymerElements/paper-styles/blob/master/shadow.html): Material Design
+[elevation](https://www.google.com/design/spec/what-is-material/elevation-shadows.html) and shadow styles
+
+4. [typography.html](https://github.com/PolymerElements/paper-styles/blob/master/typography.html):
+Material Design [font](http://www.google.com/design/spec/style/typography.html#typography-styles) styles and sizes
+
+5. [demo-pages.html](https://github.com/PolymerElements/paper-styles/blob/master/demo-pages.html): generic styles
+used in the PolymerElements demo pages
+
+@group Iron Elements
+@pseudoElement paper-styles
+@demo demo/index.html
+-->
+
 <link rel="import" href="color.html">
 <link rel="import" href="default-theme.html">
 <link rel="import" href="shadow.html">