added front page samples to testing, plus a couple of tweaks to front page and code lab

src/site/codelabs/darrrt/index.markdown

Index: src/site/codelabs/darrrt/index.markdown
diff --git a/src/site/codelabs/darrrt/index.markdown b/src/site/codelabs/darrrt/index.markdown
index 0687e94b37fd0c616e132991d3b85cfb0015fe62..71f11731531e74f47144b3e806c3a74d82f006ce 100644
--- a/src/site/codelabs/darrrt/index.markdown
+++ b/src/site/codelabs/darrrt/index.markdown
@@ -1,6 +1,6 @@
 ---
 layout: default
-title: "Try Dart"
+title: "Write Dart"
 description: "Write some Dart code. Learn some stuff."
 snippet_img: images/piratemap.jpg
 has-permalinks: true
@@ -17,7 +17,7 @@ header:
   css: ["/codelabs/darrrt/darrrt.css"]
 ---
 
-# {{ page.title }} - Write your first Dart app
+# {{ page.title }}
 
 In this code lab,
 you build a pirate badge generator from a skeleton app.
@@ -27,7 +27,7 @@ This code lab assumes that you have some programming experience.
 <strong>Build this app!</strong>
 
 <iframe class="running-app-frame"
-        style="height:220px;width:530px;"
+        style="height:220px;width:550px;"
         src="examples/6-piratebadge_json/piratebadge.html">
 </iframe>
 
@@ -436,7 +436,7 @@ Compare your app to the one running below.
 Type in the input field.
 
 <iframe class="running-app-frame"
-        style="height:220px;width:530px;"
+        style="height:220px;width:550px;"
         src="examples/2-inputnamebadge/piratebadge.html">
 </iframe>
 
@@ -735,7 +735,7 @@ Remove the text from the input field.
 Click the button.
 
 <iframe class="running-app-frame"
-        style="height:220px;width:530px;"
+        style="height:220px;width:550px;"
         src="examples/3-buttonbadge/piratebadge.html">
 </iframe>
 
@@ -1094,7 +1094,7 @@ Remove the text from the input field.
 Click the button.
 
 <iframe class="running-app-frame"
-        style="height:220px;width:530px;"
+        style="height:220px;width:550px;"
         src="examples/4-classbadge/piratebadge.html">
 </iframe>
 
@@ -1350,7 +1350,7 @@ Click the button to put a name on the badge.
 Start the app again by duplicating this window.
 
 <iframe class="running-app-frame"
-        style="height:220px;width:530px;"
+        style="height:220px;width:550px;"
         src="examples/5-localbadge/piratebadge.html">
 </iframe>
 
@@ -1703,7 +1703,7 @@ Compare your app to the final version running below.
 
 
 <iframe class="running-app-frame"
-        style="height:220px;width:530px;"
+        style="height:220px;width:550px;"
         src="examples/6-piratebadge_json/piratebadge.html">
 </iframe>