added app "federation", allows you to connect ownClouds and exchange user lists

.gitignore

apps/federation/appinfo/app.php

apps/federation/appinfo/application.php

apps/federation/appinfo/database.xml

apps/federation/appinfo/info.xml

apps/federation/appinfo/routes.php

apps/federation/controller/settingscontroller.php

apps/federation/css/settings-admin.css

apps/federation/js/settings-admin.js

apps/federation/lib/dbhandler.php

apps/federation/lib/trustedservers.php

apps/federation/middleware/addservermiddleware.php

apps/federation/settings/settings-admin.php

apps/federation/templates/settings-admin.php

apps/federation/tests/controller/settingscontrollertest.php

apps/federation/tests/lib/dbhandlertest.php

apps/federation/tests/lib/trustedserverstest.php

apps/federation/tests/middleware/addservermiddlewaretest.php

tests/enable_all.php