Added fastai course in the Deep Learning list (#3614)

* Added fastai course in the Deep Learning list

* Added fastai course in the Deep Learning list

free-courses-en.md

@@ -162,6 +162,7 @@
 * [Deep Learning for Natural Language Processing](http://cs224d.stanford.edu)
 * [MIT 6.S094: Deep Learning for Self-Driving Cars](https://selfdrivingcars.mit.edu)
 * [Practical Deep Learning For Coders taught](http://www.fast.ai) - Jeremy Howard
+* [Practical Deep Learning for Coders, v3 (using fastai library)](https://course.fast.ai)
 * [Self-Paced Courses for Deep Learning](https://developer.nvidia.com/deep-learning-courses)
 * [Unsupervised Feature Learning and Deep Learning](http://deeplearning.stanford.edu/tutorial)
 * [What is Deep Learning](https://www.udacity.com/course/deep-learning--ud730) (Udacity)