Merge pull request #131 from Carlangueitor/master

Deleted duplicated backbone.js books.
Added TCS

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

Put things from misc into appropriate postitions.
Put a few links into their correct sections, in my opinion.
Added 'Practical File System Design: The Be File System' and a large list of Smalltalk books.
Merge branch 'master' of github.com:manasij7479/free-programming-books into manasij7479-master

Conflicts:
	free-programming-books.md
Merge pull request #133 from kbara/master

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