Issue #73 Change redirecting to get_script

before redirecting pass by methods in notification controller to set read to true
Issue #73 change data-notification from idea/user id to notification id
Issue #73 change method name from read_for to set_read_for
Issue #73 re-add redirecting methods
Issue #73 Add redirect.js.erb to respont to ajax requests and redirect
Issue #73 Update routes
Issue #73 change read_for to set_read_for