Fixes the paths for generated views

Created by: 5minpause

Fixes #202 (closed).

Problem:

The documentation correctly states that view generated via rails g administrate:views should live under app/views/administrate/application/. The generatator puts them under app/views/admin/applications/ though.

Solution:

The methods that create the paths need to be adapted.

Nota bene:

While running the tests, the first arg for the generator is empty. When the generator is run inside a project, the first arg is application. This leads to the view paths having applications instead of application. This commit fixes this as well.