deskrewed unnecessary cross reference between the modules gui and http
_createLocalModel is only used in gui.HttpContext
bugfix: removed return statement in case of unstopped destroy
removed unnecessary boot and fixed buggy stop method
prevent the shutdown method from unnecessary calls
if not logged in not every page needs a dnode.Bridge. removed the
default and added only if user is logged in
bugfix: relative links to the floyd binary break FLOYD_ROOT usage
bugfix: try to use the internal coffee binary if global isn´t available