missing absolute URL for ebi-global.css

To be consistent with the rest. Just resubmitting this one as I don't think it went through the first time..

index.html

@@ -36,7 +36,7 @@
   <!-- CSS: implied media=all -->
   <!-- CSS concatenated and minified via ant build script-->
   <link rel="stylesheet" href="//www.ebi.ac.uk/web_guidelines/EBI-Framework/v1.1/libraries/foundation-6/css/foundation.css" type="text/css" media="all">
-  <link rel="stylesheet" href="css/ebi-global.css" type="text/css" media="all">
+  <link rel="stylesheet" href="//www.ebi.ac.uk/web_guidelines/EBI-Framework/v1.1/css/ebi-global.css" type="text/css" media="all">
   <link rel="stylesheet" href="//www.ebi.ac.uk/web_guidelines/EBI-Icon-fonts/v1.1/fonts.css" type="text/css" media="all">
 
   <!-- Use this CSS file for any custom styling -->