Disable help message in bpython-curtsies

Is there any way to disable the help message?

```
$ bpython --version
bpython version mercurial on top of Python 3.4.1

$ bpython
>>>
Welcome to bpython! Press <F1> for help.
```

I tried setting `help=` in my `config` file. That resulted in the below. It ends up showing `<>`, which is not very helpful.

```
$ bpython
>>>
Welcome to bpython! Press <> for help.
```

Thanks
