Add app icons and import them

Signed-off-by: Renato Carvalho <renatolz@gmail.com>
Add css reset

Signed-off-by: Renato Carvalho <renatolz@gmail.com>
Add icon arrow

Signed-off-by: Renato Carvalho <renatolz@gmail.com>
App markup and css adjustments

Signed-off-by: Renato Carvalho <renatolz@gmail.com>