Alphabetized Python books, removed duplicates

Duplicate:
[Python For Fun](http://openbookproject.net//py4fun/) By Chris Meyers
[Python for Fun](http://www.openbookproject.net/py4fun/)
Merge pull request #646 from gabriellim/patch-5

Alphabetized Python books, removed duplicates
Alphabetized R books
Merge pull request #647 from gabriellim/patch-6

Alphabetized R books
Added UNIX Tutorial for Beginners 

It is under the Creative Commons License
Merge pull request #648 from Distraught63/master

Added UNIX Tutorial for Beginners
Introduction to Matlab Programming in Turkish
Merge pull request #649 from ferhtaydn/master

Introduction to Matlab Programming in Turkish