Don't use super() for old-style classes

`super()` is for new-style classes only.
See http://docs.python.org/2/library/functions.html#super

Unpatched, the following exception is thrown on each request. After patching, requests are logged without throwing exceptions.

Note that other instances of `super()` may need to be replaced as well. I didn't check the others.

    ----------------------------------------
    Exception happened during processing of request from ('127.0.0.1', 48746)
    Traceback (most recent call last):
      File "/usr/lib/python2.7/SocketServer.py", line 295, in _handle_request_noblock
        self.process_request(request, client_address)
      File "/usr/lib/python2.7/SocketServer.py", line 321, in process_request
        self.finish_request(request, client_address)
      File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request
        self.RequestHandlerClass(request, client_address, self)
      File "/usr/lib/python2.7/SocketServer.py", line 649, in __init__
        self.handle()
      File "/usr/lib/python2.7/wsgiref/simple_server.py", line 124, in handle
        handler.run(self.server.get_app())
      File "/usr/lib/python2.7/wsgiref/handlers.py", line 92, in run
        self.close()
      File "/usr/lib/python2.7/wsgiref/simple_server.py", line 33, in close
        self.status.split(' ',1)[0], self.bytes_sent
      File "/home/tylerl/bottle/bottle.py", line 2645, in log_request
        return super(FixedHandler, self).log_request(*args, **kw)
    TypeError: must be type, not classobj
    ----------------------------------------