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 theory section (vs algorithms or misc), seed with network theory book
Professional Assembly Language book
racket guide
Added Learn CF in a Week book link
Update free-programming-books.md
Added Android Programming books.
Added Ulrich Drepper's "What Every Programmer Should Know About Memory"
Few books from hackershelf.com
Added Ada and JavaScript books

Ada 95 by John English
Ada Distilled by Richard Riehle
Ada for Software Engineers by M. Ben-Ari
JavaScript Bible by Danny Goodman

(from the r/programming thread)
Added LaTeX Wikibook
add a new, and very excellent, R book
Merge pull request #80 from woodwardjd/add-network-theory-book

add theory section (vs algorithms or misc), seed with network theory book