BLOCKER: Investigation type and ebi per preprocessed

This adds the possibility of setting investigation types and then submitting those to ebi.
No need to, your justification makes sense.

On (Nov-04-14|15:36), Antonio Gonzalez wrote:
> > @@ -397,6 +410,20 @@ def post(self, study_id):
> >              msg = "<b>Your prep template was added</b>"
> >              tab_to_display = str(raw_data_id)
> >  
> > +        elif update_investigation_type:
> > +            # updating the prep template investigation type
> > +
> 
> There is an empty line, which is valid flake8, on each elif so it clearer to read, at least for me. If you want me to remove it, just let me know. 
> 
> ---
> Reply to this email directly or view it on GitHub:
> https://github.com/biocore/qiita/pull/564/files#r19845502