Added Machine Learning Books
Added subcategory for Backbone.js and a link for 'Developing Backbone.js Applications'

Also alphabetized the subcategories under Javascript, now that there are three.
Update free-programming-books.md
Adding books about Backbone, AngularJS, GIT
2 french books on LaTeX
french book on python
mistake on the url of the book of Maïeul Rouquette (I!)
Merge remote-tracking branch 'central/master'
Add Android Resource from vogella
Add "PHP Internals Book".
Update free-programming-books.md

Updating info on books from Green Tea Press.
Merge pull request #105 from xamroc/android-vogella

Add Android Resource from vogella
Merge pull request #106 from sanpii/php-internals

Add "PHP Internals Book".
Merge pull request #107 from AllenDowney/patch-1

Update free-programming-books.md
Mooc and cb

Added Coursera and Udacity to MOOC and computing-book.
added new Javascript Book
removed blank
Added some Algorithm Books
Corrected a spelling mistake.
removed previous book from previous PR