Add codemirror support

[brauliodiez]

trafficstars

We will have a combo where you select language (Javascript, HTML, ...) and we get sintax higlighting

[albertocaparros]

This issue seems too lonely so i'll attack. Is codemirror a requirement? I've check some options and I really like this one:

Ace live demo Ace github

[mavv-coder]

I really like that one too. Alberto, ask Braulio. He told me that Daniel Sánchez (our teacher) could give some help with this issue. But maybe you can work it out on your own. I don't know, just saying…