Update free-programming-books.md

Fixed typo.
[es] Added MOOC ~ Cursos masivos en linea, section
Added book "Agile Java" to "Java" section

"Agile Java" links to a series of PDF files for individual chapters of the book.
Merge pull request #676 from RNanoware/master

Added book "Agile Java" to "Java" section
Use proper case
Alphabetize jQuery
Fix D3.js
Fix Node.js
Add "Motivate me right!" book
Merge pull request #677 from Mouseion/patch-javascript

Various fixes for JavaScript list
Update free-programming-books-zh.md
Merge pull request #679 from simonmysun/patch-1

Update free-programming-books-zh.md Javascript 原理, by Belleve Invis
18000 Stars
little fix
Merge pull request #678 from SuperStas/some-ru-book

Add "Motivate me right!" book
Add book on Backbone.js, sort Backbone books

Added: Building Single Page Web Apps with Backbone.js
Fix sorting order
Update free-programming-books-zh.md

add an item to Haskell: [Haskell 趣学指南](http://learnyouahaskell-zh-tw.csie.org/)
Merge pull request #682 from nicball/patch-2

Update free-programming-books-zh.md
Removed duplicate entry (Google Java style guide)