* 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"

the link http://google-styleguide.googlecode.com/svn/trunk/javaguide.html is broken .

Added New Links For Java And SQL of Codecademy