Add last updated timestamp to homepage

lib/site.rb

@@ -9,9 +9,17 @@ class Site
       from applications
       group by authority_name, status, decision, appeal_status, appeal_decision
     ")
+    
+    q = ScraperWiki.select("
+      scraped_at
+      from applications
+      order by scraped_at desc
+      limit 1")
+
+    last_updated = DateTime.parse(q[0]['scraped_at'])
 
     path = '.'
-    Petrify.page(path, 'index', { summary: summary })
+    Petrify.page(path, 'index', { summary: summary, last_updated: last_updated })
     Petrify.csv(path, 'inlink-summary', summary)  
 
     # New applications page

views/index.haml

@@ -1,5 +1,9 @@
 %h1 Summary
 
+%p
+  Last updated:
+  = last_updated.strftime("%d %B %Y at %l:%M%P")
+
 %p.warning There are typically two applications per kiosk: one for full planning permission or telecoms prior approval, and one for advertisement consent. So the number of kiosks applied for is half the number of applications.
 
 %p= download_button('inlink-summary.csv')