Updated & addes books from Galileo-Computing openbook library

[es] Added Operating System book + bunch of Algorythms

- IT-Handbuch für Fachinformatiker
- Objektorientierte Programmierung
- ActionScript 1 und 2
- Einstieg in ActionScript
- Visual C# 2012
- HTML5-Handbuch
- Self HTML
- JavaScript und AJAX
- PHP PEAR
- Ruby on Rails 2
- Linux-UNIX-Programmierung
- Shell-Programmierung

Add free german book an ruby

Fixed spelling mistake

Added Program Arcade Games With Python And Pygame

Added BetterSpecs (RSpec guidelines with Ruby)

Conflicts:
	free-programming-books.md

Added some books

Added You Don't Know JS

Added author names in various places

L'arte di scrivere con LaTeX - L. Pantieri e T. Gordini

[es] Updated index and +1 book on TDD

[ja] +Parallel Prog Sec with 4 books, +3 Python books, Update style aligned with en version

Removed some paid books and repetitions

- Removed 'E-Books Directory' because it's another list;
- Removed 'Messaging as a Programming Model' because it is not free;
-

Book not freely available online.  Link points to a table of contents, not the actual contents of the book.

A nice eBook from the people at GuIT (Gruppo utilizzatori Italiani di TeX).

Add "Scrum and XP from the Trenches" by H. Kniberg and translated versions in fr, de, es, it and ru