Add Pillow compatibility to the have_imread test in dipy.viz.window
Add Pillow compatibility to the have_imread test in dipy.viz.window

StongeEtienne/dipy,nilgoyyou/dipy,StongeEtienne/dipy,FrancoisRheaultUS/dipy,matthieudumont/dipy,villalonreina/dipy,matthieudumont/dipy,FrancoisRheaultUS/dipy,villalonreina/dipy,nilgoyyou/dipy