Update CHANGELOG for 0.4.1 and 0.4.2
Update CHANGELOG for 0.4.1 and 0.4.2

ember-a11y/ember-a11y-testing,ember-a11y/ember-a11y-testing,trentmwillis/ember-a11y-testing,trentmwillis/ember-a11y-testing,ember-a11y/ember-a11y-testing