#223: TGPlugin.render method doesn't support unicode template names

Traceback (most recent call last):
  File "/Users/vm/ws/mako/test/test_tgplugin.py", line 48,in test_render
    assert result_lines(tl.render({}, template=u'/index.html'))==[
  File "/Users/vm/ws/mako/mako/ext/turbogears.py", line 57,in render
    return template.render(**info)AttributeError:'unicode'object has no attribute 'render'