Force pyflakes to 1.1.0 pending a fix to 1.2.0
Force pyflakes to 1.1.0 pending a fix to 1.2.0

johnctitus/troposphere,ikben/troposphere,pas256/troposphere,7digital/troposphere,dmm92/troposphere,johnctitus/troposphere,horacio3/troposphere,horacio3/troposphere,ikben/troposphere,cloudtools/troposphere,7digital/troposphere,cloudtools/troposphere,pas256/troposphere,dmm92/troposphere