install simple_form bootstrap, implements create course ui

Signed-off-by: Jorge Cuadrado <kuadrosxx@gmail.com>
Configure mailcatcher

Signed-off-by: Jorge Cuadrado <kuadrosxx@gmail.com>
Config devise :confirmable

Signed-off-by: Jorge Cuadrado <kuadrosxx@gmail.com>
Merge remote-tracking branch 'origin/dg-ojaleros' into jc-ojaleros
Fixes on merge

Signed-off-by: dgfrancisco <yo@dgfrancisco.com>