Include gem devise to login

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Include gem cancan to restrict acess

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Include gem rolify to types of users

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>