gui python script extensions are written as string when they should be boolean

b=x.createboxfill()
b.ext_1 # is stored in VisTraisl python script as 'False' were it should be False

I think VisTrails input prots need to be updated to reflect that they are boolean.

Note: b.ext_1 = "y" is valid, user can send "y",1,True

But it is stored internally as True
