Removed a dutch book

The book about Latex was in Dutch and not in German.
Merge pull request #503 from TheHippo/patch-1

Removed a dutch book
Update free-programming-books.md

Python in Hydrology has been added to the list.
Merge pull request #504 from ugurthemaster/patch-1

Update free-programming-books.md
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
	included additional Bash resources:   free-programming-books.md
	additional books:   free-programming-books.md
Fixes two typo
	more resources:   free-programming-books.md
	modified:   free-programming-books.md
	modified:   free-programming-books.md
Merge pull request #510 from glenfordwilliams/master

more resources(linux, java, graphics, c++...etc)