Feature/refactor

[HacKanCuBa]

Several changes to the library:

• Refactor demo and debug pages
  • Fix missing character encoding and html lang tag. Refactor code structure and missplaced elements.
  • Change script source for session.js to run locally.
• Refactor session.js
  • Massive refactor to polish the code removing unused bits, changing var for let, fixing insecure http protocol for https and fixing architecture module that was broken because of a missnamed variable. Rename cookie to a more significative name: session-js.
  • Add extra client tracking with on/off switch
    • Create a switch named extra that when set records extra client information. It was added from the demo page.
  • Add a tracker property
    • This property allows to track the session from external libs or a backend. Once set, it will be written to the session and kept in the cookie.

[codejoust]

This looks good to me, thanks!