BF: fix import statement for get_cmap
BF: fix import statement for get_cmap

I think you can't do ``import module.attribute as attribute``, and you
have to do something like ``from module import attribute``.

beni55/dipy,sinkpoint/dipy,villalonreina/dipy,FrancoisRheaultUS/dipy,nilgoyyou/dipy,JohnGriffiths/dipy,matthieudumont/dipy,Messaoud-Boudjada/dipy,rfdougherty/dipy,jyeatman/dipy,demianw/dipy,rfdougherty/dipy,jyeatman/dipy,nilgoyyou/dipy,samuelstjean/dipy,Messaoud-Boudjada/dipy,samuelstjean/dipy,oesteban/dipy,mdesco/dipy,StongeEtienne/dipy,JohnGriffiths/dipy,FrancoisRheaultUS/dipy,sinkpoint/dipy,beni55/dipy,mdesco/dipy,oesteban/dipy,villalonreina/dipy,samuelstjean/dipy,matthieudumont/dipy,StongeEtienne/dipy,demianw/dipy