Moved eclipse project to top level

* Moved Eclipse project files to the top level
* Added Eclipse configuration instructions
Added fixtures

* Added fixtures for flatpages (About, Haring)
* Added how to load fixtures
Moved app secret settings

* Moved SECRET_KEY to settings_secret.py
* Added auto copying of secret settings example if an actual one is not present
Added trail visibility

* Added visible field to Trail
* Incorporated visible field into views
* Changed home view to show visible trails whose dates are on or after today
* Moved trails order logic from template to view