[Biopython] sff inot fasta and qual then trim

[Kiss, Csaba]

>Could be - disk IO will be a factor, but I suspect the quality trimming to be the slow part rather than the format conversion.

I don't think it's IO or the trimming. Mothur seems to take forever to do the sffinfo process on windows. 
Getting the 3 million sequences out was 3 hours.
The trimming took 10 minutes.
The rest of the python code to fish out my sequences 1 minute.

You see now , why I would like to make it more efficient.

Csaba