title: jinja2.exceptions.TemplateNotFound error
body: <p>i use flask and i got this error when i call this url: <code>/login</code> 
  Here's my login method:</p>
  
  <pre><code>@app.route('/login')
  def login():
      if authenticateForPanel():
          return redirect(url_for("panel"))
      else:
          getParam = request.args.getlist('redirect_uri')
          if getParam:
              ref =getParam[0]
          else:
              ref="/panel"
          return render_template( themesDir + g.blogOptions['active_theme']+'/login.html', blogOptions = g.blogOptions, ref=ref )
  </code></pre>
  
  <p>And the traceback:</p>
  
  <pre><code>Traceback (most recent call last):
    File "/Users/ozcan/Library/Python/2.7/lib/python/site-packages/flask/app.py", line 1701, in __call__
      return self.wsgi_app(environ, start_response)
    File "/Users/ozcan/Library/Python/2.7/lib/python/site-packages/flask/app.py", line 1689, in wsgi_app
      response = self.make_response(self.handle_exception(e))
    File "/Users/ozcan/Library/Python/2.7/lib/python/site-packages/flask/app.py", line 1687, in wsgi_app
      response = self.full_dispatch_request()
    File "/Users/ozcan/Library/Python/2.7/lib/python/site-packages/flask/app.py", line 1360, in full_dispatch_request
      rv = self.handle_user_exception(e)
    File "/Users/ozcan/Library/Python/2.7/lib/python/site-packages/flask/app.py", line 1358, in full_dispatch_request
      rv = self.dispatch_request()
    File "/Users/ozcan/Library/Python/2.7/lib/python/site-packages/flask/app.py", line 1344, in dispatch_request
      return self.view_functions[rule.endpoint](**req.view_args)
    File "/Users/ozcan/Documents/python/app.py", line 209, in login
      return render_template( themesDir + g.blogOptions['active_theme']+'/login.html', blogOptions = g.blogOptions, ref=ref )
    File "/Users/ozcan/Library/Python/2.7/lib/python/site-packages/flask/templating.py", line 124, in render_template
      return _render(ctx.app.jinja_env.get_or_select_template(template_name_or_list),
    File "/Users/ozcan/Library/Python/2.7/lib/python/site-packages/jinja2/environment.py", line 758, in get_or_select_template
      return self.get_template(template_name_or_list, parent, globals)
    File "/Users/ozcan/Library/Python/2.7/lib/python/site-packages/jinja2/environment.py", line 719, in get_template
      return self._load_template(name, self.make_globals(globals))
    File "/Users/ozcan/Library/Python/2.7/lib/python/site-packages/jinja2/environment.py", line 693, in _load_template
      template = self.loader.load(self, name, globals)
    File "/Users/ozcan/Library/Python/2.7/lib/python/site-packages/jinja2/loaders.py", line 115, in load
      source, filename, uptodate = self.get_source(environment, name)
    File "/Users/ozcan/Library/Python/2.7/lib/python/site-packages/flask/templating.py", line 61, in get_source
      raise TemplateNotFound(template)
  TemplateNotFound: static/themes/default/login.html
  </code></pre>
  
  <p>I am absolutely sure the login.html is there(<code>static/themes/default/404.html</code>).Why can this occur?</p>