Added Machine Learning Books
Added subcategory for Backbone.js and a link for 'Developing Backbone.js Applications'

Also alphabetized the subcategories under Javascript, now that there are three.
Update free-programming-books.md
Adding books about Backbone, AngularJS, GIT
Mooc and cb

Added Coursera and Udacity to MOOC and computing-book.
added new Javascript Book
removed blank
Added some Algorithm Books
Corrected a spelling mistake.
removed previous book from previous PR
Added "Object-Oriented Reengineering Patterns" by Demeyer, Ducasse & Nierstrasz
add Haskell: A Gentle Introduction to Haskell
Merge pull request #108 from manasij7479/master

Added a few MOOCs
Merge pull request #113 from jeroendoggen/master

Added "Object-Oriented Reengineering Patterns" by Demeyer, Ducasse & Nie...
Merge pull request #119 from a3gis/master

add Haskell: A Gentle Introduction to Haskell
Merge branch 'master' of github.com:ChrisCinelli/free-programming-books into ChrisCinelli-master

Conflicts:
	free-programming-books.md
Merge branch 'algo' of github.com:acarlos1000/free-programming-books into acarlos1000-algo

Conflicts:
	free-programming-books.md
Sage for Power Users by William Stein
Merge pull request #120 from haraldschilly/master

Sage for Power Users by William Stein
Merge pull request #63 from bryanbraun/patch-1

Added subcategory for Backbone.js and a link for 'Developing Backbone.js...