fixed usability fail in admin interface
    on unauthorized access, the user sees a splash screen
Merge branch 'master' into develop
enhanced admin feature
configured rspec and cucumber to verbose output
@wip:
    uploaded files get extracted and deleted
    folder attribute not yet assigned properly
added before_save hook in website model
    validation of folder is removed
    instead if a folder is blank, the provided file name is chosen
enhanced file_step definition for cucumber
    writes files to rails environment specific folder
    step definition changed according to that
only schema.rb changed
new rspec test to assure that a website folder is assigned after save