Mention apply_parallel in the user guide

[stefanv]

http://scikit-image.org/docs/stable/user_guide/tutorial_parallelization.html

[souravsingh]

Is the issue still open?

[stefanv]

Looks that way: https://github.com/scikit-image/scikit-image/blob/master/doc/source/user_guide/tutorial_parallelization.txt

[souravsingh]

Alright,I will work on it

[diogo-bastos]

Is this issue still open? If it is, then can I work on it?

The url https://pythonhosted.org/joblib/ is broken by the way.

Can you give me a tip about the 'apply_parallel' flag? What class does it come from? What does it have to do with the example?

[alexdesiqueira]

@stefanv ah, our apply_parallel . 🙂 I'll work on something.

[stefanv]

Maybe pull in this branch and go from there? stefanv@2a1333e

[alexdesiqueira]

That looks great 🙂 Thanks Stéfan!