Adjust templates and plugins for Smarty 3

Smarty 3 has stricter rules about quoting of filenames that templates
include.  Additionally, get_template_vars() has become GetTemplateVars

2013/04/23: Patch set 2: Fix news-article.tpl too.
2013/11/20: Patch set 3: Fix team.tpl too.
2014/04/05: Patch set 4: Update to work with recent template changes.
2014/11/19: Patch set 6: Fix competition pages.

Change-Id: I10b22dc7d44ffe49cf5885391a4771c0e228b4f3