Issue #6: Invoking CKEditor the same way Sendy does

I copied/pasted the `<script>` calls from within Sendy's create.php
file into all the pages that use the editor. I also removed the
javascript that toggled HTML, since CKEditor can take care of that
for us.
Issue #6: I missed the WYSIWYG toggle here

template_create.php had the js to toggle the wysiwyg
editor, and I had missed it.