Added python and HTML/CSS course links for beginners as part of hacktoberfest2020 (PR resubmission) (#4298)

* Added a python course link

As  part of hacktoberfest20

* updated free-courses-en.md with a new link

As  per the requirements the link is alphabetically added

* Added an HLML&CSS course link

* Changed the extra blanklines

* updated with platform and tutor name

* updated the course list

* Updated the file again

* updated the list

free-courses-en.md

@@ -249,6 +249,7 @@
 * [CSS Grid](https://cssgrid.io) - Wesbos
 * [CSS Tutorial](https://www.youtube.com/playlist?list=PL_RGaFnxSHWqMH9a9DY8LFKrJ5NJCFHHe)
 * [Flexbox in 30 Days](https://github.com/samanthaming/Flexbox30) - Samantha Ming
+* [HTML and CSS Crash Course](https://scrimba.com/learn/htmlcss) - Kevin Powell (scrimba)
 * [HTML Tutorial](https://www.youtube.com/playlist?list=PL_RGaFnxSHWr_FB-hVEgEGUESZL1TOiJ6)
 * [Learn how to program: CSS](https://www.learnhowtoprogram.com/css) - Epicodus Inc.
 * [Learn HTML5 Programming From Scratch](https://www.udemy.com/learn-html5-programming-from-scratch/)
@@ -467,6 +468,7 @@
 * [Programming Foundations with Python](https://www.udacity.com/course/programming-foundations-with-python--ud036) (Udacity)
 * [Python Beginners-Intermediate Tutorial](https://www.youtube.com/playlist?list=PL-osiE80TeTt2d9bfVyTiXJA-UTHn6WwU) - Corey Schafer
 * [Python Course](http://www.python-course.eu)
+* [Python Course from scratch](https://scrimba.com/playlist/pNpZMAB) - Olaf Paulson (scrimba)
 * [Python Django Basics Tutorial](https://www.youtube.com/playlist?list=PL-osiE80TeTtoQCKZ03TU5fNfx2UY6U4p) - Corey Schafer
 * [Python Flask Framework Tutorial](https://www.youtube.com/playlist?list=PL-osiE80TeTs4UjLw5MM6OjgkjFeUxCYH) - Corey Schafer
 * [Python Flask Tutorial](https://www.tutorialspoint.com/flask/flask_overview.htm) (TutorialsPoint)