ignore Bundler exceptions when running outside the directory on PROD.
Personenverzeichnis db_path ist relativ zum `Rails.root`

Das Personenverzeichnis muss auch auserhalb des Rails.root Directories
aktualisiert werden können.

Behebt folgenden Fehler:

```
$ /var/www/rails-geschaeftsverzeichnis-PROD/bin/rails runner Rails.application.config.personenverzeichnis.fetch_data!
/usr/local/rbenv/versions/2.0.0-p451/lib/ruby/2.0.0/open-uri.rb:36:in `initialize': No such file or directory - db/personenverzeichnis.json (Errno::ENOENT)
	from /usr/local/rbenv/versions/2.0.0-p451/lib/ruby/2.0.0/open-uri.rb:36:in `open'
	from /usr/local/rbenv/versions/2.0.0-p451/lib/ruby/2.0.0/open-uri.rb:36:in `open'
	from /var/www/rails-geschaeftsverzeichnis-PROD/app/services/personenverzeichnis.rb:25:in `store'
	from /var/www/rails-geschaeftsverzeichnis-PROD/app/services/personenverzeichnis.rb:112:in `fetch_data!'
	from /var/www/rails-geschaeftsverzeichnis-PROD/vendor/bundle/ruby/2.0.0/gems/railties-4.1.0.beta1/lib/rails/commands/runner.rb:53:in `<top (required)>'
	from /var/www/rails-geschaeftsverzeichnis-PROD/vendor/bundle/ruby/2.0.0/gems/railties-4.1.0.beta1/lib/rails/commands/runner.rb:53:in `eval'
	from /var/www/rails-geschaeftsverzeichnis-PROD/vendor/bundle/ruby/2.0.0/gems/railties-4.1.0.beta1/lib/rails/commands/runner.rb:53:in `<top (required)>'
	from /var/www/rails-geschaeftsverzeichnis-PROD/vendor/bundle/ruby/2.0.0/gems/railties-4.1.0.beta1/lib/rails/commands/commands_tasks.rb:128:in `require'
	from /var/www/rails-geschaeftsverzeichnis-PROD/vendor/bundle/ruby/2.0.0/gems/railties-4.1.0.beta1/lib/rails/commands/commands_tasks.rb:128:in `require_command!'
	from /var/www/rails-geschaeftsverzeichnis-PROD/vendor/bundle/ruby/2.0.0/gems/railties-4.1.0.beta1/lib/rails/commands/commands_tasks.rb:95:in `runner'
	from /var/www/rails-geschaeftsverzeichnis-PROD/vendor/bundle/ruby/2.0.0/gems/railties-4.1.0.beta1/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
	from /var/www/rails-geschaeftsverzeichnis-PROD/vendor/bundle/ruby/2.0.0/gems/railties-4.1.0.beta1/lib/rails/commands.rb:17:in `<top (required)>'
	from /var/www/rails-geschaeftsverzeichnis-PROD/bin/rails:8:in `require'
	from /var/www/rails-geschaeftsverzeichnis-PROD/bin/rails:8:in `<main>'
```
Konfigurationen im `config/settings.yml` zur Verfügung stellen.

Wir brauchen kein separates Staging env. Die Konfigurationen können pro
Deployment im `config/settings.yml` angepasst werden.
enable tracking code via `config/settings.yml`.