Added introductory book on parallel computing

This book "is intended to provide only a very quick overview of the extensive and broad topic of Parallel Computing."  There is another book by the same title, but its text isn't free.

assembleur 64 bits

2 books on (plain) TeX

Liste de livres en Français

Adds J

importation de fhttp://progdupeu.pl/forums/suje43/une-banque-de-liens + corrections divers de markdown

added some tutorials and style-guides to Ruby and Rails sections

liste de livre en français sur python (620d0b0e) et latex (2c1157c5 373ddcb5) dans un fichier à part

Added the Language Agnostic subsections to TOC

Add Problem Solving with Algorithms and Data Struc

more hackershelf books, some refactoring

Found myself scrolling through the Language Agnostic section a lot; added TOC for quicker access.

Add Problem Solving with Algorithms and Data Structures. Since it is
written in python, I have added it twice.

This was suggested by Fabian Dablander on the Python community on
Facebook.

Add Dart language;
Reorder meta-lists, add O'Reilly Commons and hacker shelf
Remove duplicate (Bayesian Methods for Hackers)
Additions from hackershelf

Put Flask under Python

Adding Octave

Update free-programming-books.md

Added Adobe Flex2 programming book

added french list and 2 books (C, Javascript)

Scientific python 

Add Hadoop Illuminated

Minor changes

Fix "Programming Computer Vision with Python" link