Add URL enhancer

* option to add an url enhancer per model
* add the models Nos\Orm_Behaviour_Virtualname and Nos\Orm_Behaviour_Urlenhancer on the model
* create views to generate a list of 10 items and to display each item on a page with url rewriting
Confusion between $model['table_name'] and strtolower($model['name'])
Merge pull request #5 from jay3/url_enhancer

Add URL enhancer