Docs es

Hey @bucaran, 

here you can find a review of everything so far and the translated recipes. Let me know what you think, ok? Honestly :). I did what I thought is ok. Let me know if should merge this into master. Do all the changes you think are more clear. 

I still have to take a look at how it looks as a whole. What I've tried to do is to be as closer as to the original documentation as possible (even if that's painful sometimes). Just because if we start to differ from the original files this can be a mess pretty soon. From my point of view we have to just adapt the original documentation and if anything add links for the language this translation aims for.