* Add Pharo book

* fix space

* Add Pharo books

* Update free-programming-books.md

* Update free-programming-books.md

* fix the last spacing problem

* 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

* Added new documentation for Django. 
* Removed http://gettingstartedwithdjango.com as the site is down for a long time.
* Updated the Tango with Django book
* Removed the "The Django Book" as it was very old version of Django

* Added Happy Learn Haskell Tutorial
* corrected travis messages
* corrected Alphabetical ordering
* Remove trailing slash

Add CodeNewbie podcast (Language Agnostic)

Add CodeNewbie podcast to the Language Agnostic section of free-podcasts-screencasts-en.md

(this is my first pull request, so if I make silly mistakes, sorry and please correct me! :))

Update broken link to google's cpp style guide

Updated the PowerShell.org free ebooks. 

Fix link to assembly language succinctly

Fixed Broken URL

Adds the book "O Editor de Texto Vim"