Fix Git header
Fix Knockout.js section link
Fix headers
Update free-programming-books-es.md Adding Git

Adding a spanish Git resource on http://librosweb.es.
#Adding a Python resource to Spanish list

Python para principiantes
http://www.librosweb.es/python/
Make the README a little more clear
Merge pull request #508 from voltagex/patch-1

Make the README a little more clear
Merge pull request #507 from Robalni/master

Header and index corrections
Merge pull request #506 from cmeraz/master

Update free-programming-books-es.md Adding Git