OpenSearch support.

This implements #804.

app/views/integrations/search_plugin.rxml

@@ -0,0 +1,14 @@
+xml.instruct!
+
+xml.OpenSearchDescription 'xmlns' => "http://a9.com/-/spec/opensearch/1.1/" do
+
+  xml.ShortName Tracks
+  xml.Description 'Search in Tracks'
+  xml.InputEncoding 'UTF-8'
+  xml.Image("data:image/x-icon;base64," + @icon_data, 
+			'width' => '16', 'height' => '16')
+  xml.Url 'type' => 'text/html', 'method' => 'GET', 
+	'template' => url_for(:controller => 'search', :action => 'results',
+						  :only_path => false) + '?search={searchTerms}'
+end
+

app/views/layouts/standard.html.erb

@@ -19,6 +19,9 @@
   
   <link rel="shortcut icon" href="<%= url_for(:controller => 'favicon.ico') %>" />
   <%= auto_discovery_link_tag(:rss, {:controller => "todos", :action => "index", :format => 'rss', :token => "#{current_user.token}"}, {:title => "RSS feed of next actions"}) %>
+<link rel="search" type="application/opensearchdescription+xml"
+      title="Tracks"
+      href="<%= search_plugin_path %>" />
 
 <script type="text/javascript">
 window.onload=function(){