[BioPython] Clustalw documentation

[Brad Chapman]

Hi Michiel;

> Is the documentation for Clustalw in the Biopython tutorial still up to 
> date? I am getting the following error when I try to run the example in 
> the tutorial (in chapter 3.5.1)
> 
> >>> from Align.Clustalw import MultipleAlignCL
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ImportError: No module named Align.Clustalw

Thanks for pointing this out. It's a typo in the documentation -- it
should be:

>>> from Bio.Clustalw import MultipleAlignCL

I've fixed this in the Tutorial (along with other some other errors
I turned up).

Thanks!
Brad