change file-permissions, closes #44

app/controllers/admin/courseware.php

app/controllers/admin/ilias_interface.php

app/controllers/contents/courseware.php

app/controllers/contents/overview.php

app/controllers/course/courseware.php

app/controllers/my_ilias_accounts.php

app/controllers/oer/admin.php

app/controllers/oer/endpoints.php

app/controllers/oer/market.php

app/controllers/oer/mymaterial.php

app/controllers/oer/oai.php

app/views/admin/courseware/admin_action_widget.php

app/views/admin/courseware/admin_view_widget.php

app/views/admin/courseware/index.php

app/views/admin/ilias_interface/add_ilias.php

app/views/admin/ilias_interface/edit_content.php

app/views/admin/ilias_interface/edit_interface_settings.php

app/views/admin/ilias_interface/edit_permissions.php

app/views/admin/ilias_interface/edit_server.php

app/views/admin/ilias_interface/index.php