Update credits

views/layout.haml

@@ -40,10 +40,8 @@
         %p
         %p
           An independent website designed by
-          %a{ :href => "http://adrianshort.org/" }<
+          %a{ :href => "https://adrianshort.org/" }<
             Adrian Short
-          %a{ :href => "https://twitter.com/adrianshort"}<
-            @adrianshort
         %p  
           Powered by data from 
           %a{ :href => "http://www.sutton.gov.uk/" }<