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

Adding @hadoop-illuminated to the free book list.

scientific python resources

Django is a high-level Python Web framework, therefore, it should be
included as a subsection of `Python`.

Ref: https://www.djangoproject.com/

Added 'Practical File System Design: The Be File System' and a Smalltalk list.

Conflicts:
	free-programming-books.md

Put things from misc into appropriate postitions.
Put a few links into their correct sections, in my opinion.

New category: Theoretical OCmputer Science
(Put stuff about automata,formal languages,computability..etc into it)

Deleted duplicated backbone.js books.

Update free-programming-books.md

Added book to Mathematics section

Added some more books. I've found both of these extremely useful :)

Added book to Datamining section

Introduction to Statistical Thought by Michael Lavine

The Elements of Statistical Learning: Data Mining, Inference, and Prediction.  By Trevor Hastie, Robert Tibshirani, and Jerome Friedman

Added book by David MacKay to Machine Learning section

Information Theory, Inference, and Learning Algorithms

Added first line (python) in italian list