i18n refactoring: Rename all _() (reserved by gettext) calls to t().

- And refactor printf to our string interpolation / pluralization syntax
- Also, a slight change to the translations_incomings table, using binary(16) instead of char(32) as message key.

modules/comment/views/admin_block_recent_comments.html.php

@@ -3,8 +3,9 @@
   <? foreach ($comments as $comment): ?>
   <li>
     <?= date("Y-M-d H:i:s", $comment->created) ?>
-    <? printf(_("%s said %s"), "<a href=\"#\">$comment->author</a>",
-              "<i>\"" . text::limit_words($comment->text, 50) . "\"</i>"); ?>
+    <?= t("{{author_name}} said {{comment_text}}",
+          array("author_name" => "<a href=\"#\">$comment->author</a>",
+                "comment_text" => "<i>\"" . text::limit_words($comment->text, 50) . "\"</i>")); ?>
   </li>
   <? endforeach ?>
 </ul>