Build spanish version

[Robinlovelace]

Heads-up @DataMirai and @Nowosad I'm working on it! We should see a placeholder for the es version here soon! https://geocompr.github.io/es/

[Robinlovelace]

It's up and online! Check it out @DataMirai and let me know what you think, should capitulo 2 be there?