Backward compatibilities problem with streamtube

[skoudoro]

Description

After playing with dipy_horizon, you can see that streamlines are in Black&White instead of color when you use the master branch instead of the release 0.4.0.

The recent PR (#129) change the original behavior so :

• we have to get back to the original behavior
• find a workaround to manage the new color features (look at the old one here)

[Nibba2018]

@skoudoro I don't think I understand the issue properly. Are the streamlines black & white even though the default parameter is RGB?

[skoudoro]

I am working on this issue, no worries ;-) thank you

[Nibba2018]

@skoudoro Great 👍