ES.po - refreshed references to match the comic + some spell fixes

I would like to generate transcripts for Spanish, and this is the first step.

I updated the references in es.po to match the comic.

It's not that important, but I'd like someone to check it. @rgarciag and @TheFaico

I'm also planning to continue with this one: #159 (closed)
My plan is to bring the characters closer together and make it narrower to fit better.:
Do you agree with this?

Edit: I did some fixes using a spell-checker and I translated EP2P02