bugfix - collection events to organizer
bugfix - collection events to organizer

- keep ALL_PERSMISSION for "registered role" because it is not so
important to change by now. It does not affect other functions and
granting all permission simplifies the deletion of an organizer
function (in case added later)

- change ALL_PERMISSION for "default" user to only READ_PERMISSION to
make sure that there will be no case, a not-logged-in user can remove
the role of an organizer

clemens-huebner/amos-ss16-proj8,clemens-huebner/amos-ss16-proj8,clemens-huebner/amos-ss16-proj8