Very minor setup.py problem

[iDontGitUsernames]

It looks like the package name for scikit-learn has changed from sklearn. Installing scikit-learn manually seems to get around the issue, but just wanted to mention since it may cause issues for novice users.

[wasserth]

Thanks for pointing this out. I just changed it. When installing from the master branch this should be fine now.

[ebrahimebrahim]

This issue is still present in the cython_tracking branch -- it will perhaps be fixed when cython_tracking is brought back up to date with main