attempt to fix PIL conversion, fix threshold function, make channels return 3-channel images in grayscale mode
attempt to fix PIL conversion, fix threshold function, make channels return 3-channel images in grayscale mode

hurdlea/SimpleCV,jlegendary/SimpleCV,gskielian/SimpleCV,tpltnt/SimpleCV,beni55/SimpleCV,hayd/SimpleCV,hurdlea/SimpleCV,nils-werner/SimpleCV,tpltnt/SimpleCV,hurdlea/SimpleCV,hurdlea/SimpleCV,onaclovtech/SimpleCV,hayd/SimpleCV,nils-werner/SimpleCV,beni55/SimpleCV,onaclovtech/SimpleCV,jlegendary/SimpleCV,jayrambhia/SimpleCV2,jyt109/SimpleCV,nikhilgk/SimpleCV,sightmachine/SimpleCV,beni55/SimpleCV,sightmachine/SimpleCV2,jlegendary/SimpleCV,sightmachine/SimpleCV,jayrambhia/SimpleCV2,nils-werner/SimpleCV,beni55/SimpleCV,gskielian/SimpleCV,sightmachine/SimpleCV,jyt109/SimpleCV,sightmachine/SimpleCV2,jlegendary/SimpleCV,nikhilgk/SimpleCV,sightmachine/SimpleCV2,onaclovtech/SimpleCV,jayrambhia/SimpleCV2,beni55/SimpleCV,gskielian/SimpleCV,tpltnt/SimpleCV,sightmachine/SimpleCV,sightmachine/SimpleCV2,gskielian/SimpleCV,nikhilgk/SimpleCV,nils-werner/SimpleCV,nils-werner/SimpleCV,hayd/SimpleCV,nikhilgk/SimpleCV,onaclovtech/SimpleCV,nikhilgk/SimpleCV,jlegendary/SimpleCV,jayrambhia/SimpleCV2,hayd/SimpleCV,jyt109/SimpleCV,onaclovtech/SimpleCV,hayd/SimpleCV,jyt109/SimpleCV,tpltnt/SimpleCV,sightmachine/SimpleCV,jyt109/SimpleCV,gskielian/SimpleCV,hurdlea/SimpleCV,tpltnt/SimpleCV