[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