improve header ux
Merge branch 'master' of github.com:Piour/cozy-feeds
change style for options (add feed, settings, help...)

* put settings in the right part
* remame layout classes
* autosave setting changes
improve left menu styles and main content layout
add responsive features
improve loading ux
small code improvement for reload tag clicked
add missing assets
fix font paths
brunched
fix font paths
change style files organization
style fix
i dont understand why i should set a width limit
spinner wasnt displaying correctly with chrome and not using image may lead to performance issues + changing a few paddings
changing colors
update help and README