Close #16 Documentation Update and remove Spanish

Pulls in @individual61 's changes for the next release :sparkles: 

- update a huge amount of docs
- remove Spanish versions

Especially with the later one I am thinking about aiming for a `0.6.0` release instead of a `0.5.5` release since it "reduces" some functionality and changes the structure a bit more than just "fixing bugs" :)

Ok but on the other hand it's just "removing" files. Could be `0.5.5` anyway.

Newline: done.

Markdown: I considered it and very briefly looked into it. I certainly would like to make the manual easier to read and maintain, but that's one for the future I think. This was one of the (few) things I decided *not* to mess with right now. =)

I also realize that my initial impressions of the result of markdown were way off. This is because my text editor (TextMate) makes markdown source look terrible. After some investigation, spurred by your link above, it turns out that I can get a very nice-looking preview if I run the right command. In summary, then, yes, let's see if I can move the documentation to markdown in a future release. We can discuss any downsides when we next talk.