[Bf-python] tp_getset update

[Yehoshua Sapir]

>     (3) does anyone have an idea how the doc field in the tp_getset is
> accessed?  For example:
>
>          {"bias",
>          (getter)Lamp_getBias, (setter)Lamp_setBias,
>          "Lamp shadow map sampling bias",
>          NULL},
>
> If I try "print lamp.bias.__doc__" I get a doc string explaining how 
> to use a float (which is the type of "bias").  I haven't found 
> anything in the Python docs which explain how to access this field; 
> maybe it isn't implemented yet?

help(lamp) and help(lamp.bias) work.