use web cache dir by less processor
[css] do not put default style in @media screen
[css] set memory limit to 128M for Less.php; do not use __DIR__
[controller] always initialize view.books
[css] no default 'right' style for #toggle-nav-link
update vendors
rm dev code
[view, css] use progress bar from bootstrap
[view, css] replace progress icons with font awesome