Reset password feature and update user endpoint

[d0peCode]

This PR contains following:

• reset password endpoints which expect to get email and send mail with randomly generated password.
  • router.post('/resetStart', auth(), userController.reset.sendMail) send email
  • router.get('/resetConfirm', userController.reset.updatePass) (entered from link in mail) confirm password change
• update user endpoint*
  • router.put('/update', validator(update), auth(), userController.update)

*With security in mind I don't allow to update every field. I've created validation with Joi which allow only password and name change. However it can be easily configure by other developer to his own need.