provide macro definition for metadata in HTML head section (to be filled by controller macro specifications)

browser/base_macros.pt

@@ -10,6 +10,12 @@
 </metal:logo>
 
 
+<metal:meta define-macro="meta">
+  <meta tal:attributes="name macro/name;
+                        content macro/content" />
+</metal:meta>
+
+
 <metal:css define-macro="css"
            tal:define="isIE macro/is_ie|nothing">
   <tal:ie condition="isIE"

browser/main.pt

@@ -14,6 +14,10 @@
     </title>
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 
+    <tal:meta repeat="macro controller/macros/meta">
+      <metal:css use-macro="macro" />
+    </tal:meta>
+
     <tal:css repeat="macro controller/macros/css">
       <metal:css use-macro="macro" />
     </tal:css>