Update L&F

* Remove shadows
* Incrase background contrast
* Replace slider
Remove 90's border
Avoid overlaping navigation actions, keep calm (TM)
Fix thumbnail navigation on resizing
Update book viewer

* Move zoom button to a mixin
* Clicking on detail image, puts image on #main, shows loupe overlay
* Clicking back on detail image, restores page image
Show # elements in sidebar sections
Show date on comments
Show year on title, put author in second line
Read json again
Read again json and move dummy content away
Reposition detail when clicking