Feature request: Add a check for raise foo from bar

[cool-RR]

I recently went over Matplotlib, Pandas and NumPy, fixing a small mistake in the way that Python 3's exception chaining is used. I've done it here too (#3681 )

I suggested to @Pierre-Sassoulas that this should be a PyLint rule.

@jdufresne wrote a flake8 plugin that does this, plus catches two other raise-related issues that I like and could be added as well.

What do you think?

[PCManticore]

Sounds like a good idea, thanks for the suggestion!

[cool-RR]

I'm working on implementing this feature.