Merge branch 'master' of github.com:vhf/free-programming-books
Merge remote-tracking branch 'central/master'
Update free-programming-books.md

Fixed typo.
Merge remote-tracking branch 'central/master'
Merge remote-tracking branch 'central/master'
[es] Added MOOC ~ Cursos masivos en linea, section
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)
Merge branch 'master' of github.com:vhf/free-programming-books
Merge pull request #683 from BryanSLam/patch-1

Removed duplicate entry (Google Java style guide)
[es] Cleanup & reorganizing link (sort & remove duplicated)
Two "Non-Programmers" tutorials for python 2.6&3 added
Merge pull request #685 from krzysztofr/master

Two "Non-Programmers" tutorials for python 2.6&3 added
dodaje pythona, c, c++, sql
Adding AJAX to the list. Edit some books positions to be consistent with: CONTRIBUTING.md
Merge pull request #687 from matysanchez/master

Adding AJAX to the list. Edit some books positions to be consistent with: CONTRIBUTING.md
Merge pull request #686 from agilob/patch-1

adding python, c, c++, sql to the list in Polish