WIP - Add touristic content and event

- [x] Touristic content models
  - [x] Extract email and url from contact
  - [x] Generic lists
- [x] Touristic event models
  - [x] Extract email and url from contact
- [x] Touristic content fixtures
- [x] Touristic event fixtures
- [x] Touristic content edit form and template
- [x] Touristic event edit form and template
- [x] Touristic content detail template
- [x] Touristic event detail template
- [x] Computed areas
- [x] Translations
- [x] Experimental feature
- [x] Functional test for type1/type2 selection in touristic content forms