- Completely redo javascript code: we use backbone.js and underscore.js now; I managed to make the js about 100 lines smaller this time!

- Upgrade Twitter bootstrap 2 to Twitter bootstrap 3
- All options that are persisted using cookies are now disabled by default until you click the corresponding button (this means progressing, refreshing and sidebar opening)
- Add support for page images: now I can finally display some logos
- General bugfixing / cleanup / layout and css fixes