mostrar usuarios sin mail
añadida columna valid_email
añadida columna email valido a tabla usuarios
añadida columna email valido a tabla usuarios v2
First commit of change redirection

i see the logic has a redundace in if user.members.any? &:manager, the
two ways has same result but if in the future for some reson the team
need change this we'll can customize each one
Change default redirection #2

Deleted white space
Can merge and delete tags

Changed style to show new tag field name and buttons properly in layout.