\baseNamespace is configured in config.json defaults to \FWAPP
If you change the baseNamespace, be sure to update composer.json for autoloading

Directory structure and namespace structure should follow
modulename/ --          Namespace: \baseNamespace\modulename
    Module.php
    views/ --           Namespace: \baseNamespace\modulename\views
        ListView.php
        Detail.php
        ...
    actions/ --         Namespace: \baseNamespace\modulename\actions
        SomeAction.php
        ...
    templates/
        ListView.tpl 
        Detail.tpl 
        ...
