update elements and fix some bugs

lib/src/paper-material/paper-material.html

Index: lib/src/paper-material/paper-material.html
diff --git a/lib/src/paper-material/paper-material.html b/lib/src/paper-material/paper-material.html
index 06b258d3df863b09b9d5f7f64ecde7227a7cc1db..3affcc23ae825969a115026c6a6eeee2eaaf1c30 100644
--- a/lib/src/paper-material/paper-material.html
+++ b/lib/src/paper-material/paper-material.html
@@ -12,6 +12,7 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
 <link rel="import" href="../paper-styles/shadow.html">
 
 <!--
+Material design: [Cards](https://www.google.com/design/spec/components/cards.html)
 
 `paper-material` is a container that renders two shadows on top of each other to
 create the effect of a lifted piece of paper.
@@ -23,42 +24,42 @@ Example:
     </paper-material>
 
 @group Paper Elements
-@class paper-material
 @demo demo/index.html
 -->
 
 <dom-module id="paper-material">
-  <style>
-    :host {
-      display: block;
-      position: relative;
-    }
+  <template>
+    <style>
+      :host {
+        display: block;
+        position: relative;
+      }
 
-    :host([animated]) {
-      @apply(--shadow-transition);
-    }
+      :host([animated]) {
+        @apply(--shadow-transition);
+      }
 
-    :host([elevation="1"]) {
-      @apply(--shadow-elevation-2dp);
-    }
+      :host([elevation="1"]) {
+        @apply(--shadow-elevation-2dp);
+      }
 
-    :host([elevation="2"]) {
-      @apply(--shadow-elevation-4dp);
-    }
+      :host([elevation="2"]) {
+        @apply(--shadow-elevation-4dp);
+      }
 
-    :host([elevation="3"]) {
-      @apply(--shadow-elevation-6dp);
-    }
+      :host([elevation="3"]) {
+        @apply(--shadow-elevation-6dp);
+      }
 
-    :host([elevation="4"]) {
-      @apply(--shadow-elevation-8dp);
-    }
+      :host([elevation="4"]) {
+        @apply(--shadow-elevation-8dp);
+      }
+
+      :host([elevation="5"]) {
+        @apply(--shadow-elevation-16dp);
+      }
+    </style>
 
-    :host([elevation="5"]) {
-      @apply(--shadow-elevation-16dp);
-    }
-  </style>
-  <template>
     <content></content>
   </template>
 </dom-module>
@@ -67,7 +68,6 @@ Example:
     is: 'paper-material',
 
     properties: {
-
       /**
        * The z-depth of this element, from 0-5. Setting to 0 will remove the
        * shadow, and each increasing number greater than 0 will be "deeper"