Quitamos campos que ya existían.
Merge branch 'master' of https://github.com/usabi/gfp
Merge branch 'master' of https://github.com/usabi/gfp
Merge branch 'master' of https://github.com/usabi/gfp
Merge branch 'master' of https://github.com/usabi/gfp
Merge branch 'master' of https://github.com/usabi/gfp
Merge branch 'master' of https://github.com/usabi/gfp
Merge branch 'master' of https://github.com/usabi/gfp
Merge branch 'master' of https://github.com/usabi/gfp
Merge branch 'master' of https://github.com/usabi/gfp
Merge branch 'master' of https://github.com/usabi/gfp
Merge branch 'master' of https://github.com/usabi/gfp
Merge branch 'master' of https://github.com/usabi/gfp
Evitamos la validación del modelo teacher cuando hacemos cambio de perfil
porque lanza las validaciones de objetos que no están en pantalla y pueden fallar.