Added Git, Ruby and Haskell Books.

Added a Git and a Latex book.

Removida separação da lista em "Front-End" e "Back-End", pois a lista não se restringe a desenvolvimento web.
Links e itens da lista ordenados alfabeticamente, aderindo ao padrão das outras listas.

Removed list's division into "Front-End" and "Back-End" itens, since it's not restricted to web development.
Links and itens were ordered alphabetically, following the standard from most other lists.

The lists were short, disorganized and confused, then I organized by "front-end" and "back-end".

Python para desenvolvedores

Introducao ao Shell Script - Aurelio ( Verde ) 
Tutorial de Ruby - Eustaquio Rangel

Added a HTML/CSS book in the pt_BR list.