Build: Handle pre-releases for UI

Fixes jquerygh-11

Author: scottgonzalez

templates/index.hbs

@@ -35,14 +35,19 @@
 	<a href="/ui/">See all versions of jQuery UI</a>.
 </p>
 
-{{#with ui.[0]}}
-	{{include "ui-latest"}}
-{{/with}}
-
+{{#if ui.[0].latestStable}}
+	{{#with ui.[0]}}
+		{{include "ui-latest"}}
+	{{/with}}
+{{/if}}
 {{#with ui.[1]}}
 	{{include "ui-latest"}}
 {{/with}}
-
+{{#unless ui.[0].latestStable}}
+	{{#with ui.[2]}}
+		{{include "ui-latest"}}
+	{{/with}}
+{{/unless}}
 {{#with mobile.latestStable}}
 <h2>jQuery Mobile</h2>
 <p>

templates/ui.hbs

@@ -6,13 +6,19 @@
 
 {{#each ui}}
 	<h2>jQuery UI {{major}}</h2>
-	{{release "jQuery UI" latestStable}}
-	<h3>Themes</h3>
-	{{#each latestStable.themes}}
-		<a href="/ui/{{../latestStable/version}}/themes/{{this}}/jquery-ui.css">{{this}}</a>
-	{{/each}}
+	{{#if latestStable}}
+		{{release "jQuery UI" latestStable}}
+		<h3>Themes</h3>
+		{{#each latestStable.themes}}
+			<a href="/ui/{{../latestStable/version}}/themes/{{this}}/jquery-ui.css">{{this}}</a>
+		{{/each}}
+	{{/if}}
 	{{#if all.length}}
-		<h3>Previous Releases</h3>
+		{{#if latestStable}}
+			<h3>Previous Releases</h3>
+		{{else}}
+			<h3>Pre-Releases</h3>
+		{{/if}}
 		<ul>
 		{{#each all}}
 			<li>