fix #3: no mixed content warnings

templates/footbar.tx

@@ -1,6 +1,6 @@
 <div style="display:inline; vertical-align:top"> 
 <a rel="license" style="text-decoration:none" href="http://creativecommons.org/licenses/by/2.5/">
-    <img alt="Creative Commons License" border="0" src="http://creativecommons.org/images/public/somerights20.gif" />
+    <img alt="Creative Commons License" border="0" src="<: $scheme :>://creativecommons.org/images/public/somerights20.gif" />
 </a>
 </div>
 <div style="display:inline-block;">

templates/title.tx

@@ -1,3 +1,3 @@
 <a href="http://www.pm.org/index.html">
-    <img alt="Perl Mongers' Site" src="http://www.pm.org/graphics/title.png" height="65" width="150" style="margin-top:.5rem; margin-right: .5rem;" />
+    <img alt="Perl Mongers' Site" src="<: $scheme :>://www.pm.org/graphics/title.png" height="65" width="150" style="margin-top:.5rem; margin-right: .5rem;" />
 </a>