[Report] Build on html5 features

[yscialom]

HTML

• [ ] Use <tme> element
• [ ] Get rid of type attribute in <script> and <style>
• [ ] Use new syntax to specify encoding: <meta charset="utf-8" />
• [ ] Use <main> element?
• [ ] The <del> could indicate deleted job offers

CSS

JavaScript

• [ ] Cache computed data into data-custom attributes
• [ ] Use local storage instead of cookies