* Added section about Data Science

* Update free-courses-en.md

* Added course about Git

* added NodeJS Documentation as a javascript framework resource

* added Angularjs material designing resource to javascript framework resources

* rearranged position of angular material desigining

* added machine learning free course on coursera.org

* Add learn:query - Learn JavaScript Fundamentals

* Removed trailing slash from link

* Add deep learning courses

* fix accidental change

* remove trailing slash

* Added NVIDIA's Deep Learning Course

* Add Berkeley's CS61 Data Structures free course

* Add LouvainX courses on Computer programming paradigms

* Add MIT's Software construction in Java course

* Add Advanced Software Construction course

* Change Algorithmic to Algorithms and Data Structures

* Add software engineering section with 4 courses

* Fix to alphabetically order courses

* Add computer science theory section

* Add theory section to index

* Add compilers section with course

* Fix spacing for Theory courses

* Fix alphabetical ordering

* Add Data Structures PDF by Paul Hilfinger from Berkeley

* Added a bash tutorial in free-courses-en.md

* Missing PDF indication

Fix broken link.

* Angular Course added closes #1690

* Inroduction to Rx closes #1817

* Overwork on free-prpgramming-books-zh.md

* Done #1948

* Deleted not-freely obtainable ebook closes #1930

In the android section, a link was taking to a 404 page. The link was mentioned as (https://www.coursera.org/course/androidpart1apps101) instead of (https://www.coursera.org/course/androidapps101/)

CUDA is programming language for Nvidia GPUs. This is a course from Udacity, where you can start learning Cuda programming.

reorder in alphabetical order

modify name

added python and flask source

Move links from free books to free courses.

More Coursera courses for android (Programming Mobile Applications for Android Handheld Systems is a two part course, so just split the older entry), misc, as well as others above.