swap fractions on image and filter transforms for 4x4
swap fractions on image and filter transforms for 4x4

coufon/neon-distributed,NervanaSystems/neon,Jokeren/neon,dongjoon-hyun/neon,Jokeren/neon,coufon/neon-distributed,NervanaSystems/neon,dongjoon-hyun/neon,NervanaSystems/neon,coufon/neon-distributed,Jokeren/neon,dongjoon-hyun/neon,NervanaSystems/neon,Jokeren/neon