Added "views_path" property in Configuration to customize views direc…

[ole1986]

This PR added a new configuration property "views_path" allow to define a different views directory to customize the authentication.ejs as well as the consent.ejs templates.

Configuration.init({
  crypto_auth_token_secret_key_32: '[...]',
  project_api_key: '[...]',
  view_path: path.join(__dirname, '../../views')
});

Would really appreciate this to be part of the project. Thank you