Made the initializer ember 1.13/2.0/2.1 friendly
Made the initializer ember 1.13/2.0/2.1 friendly

toranb/ember-modal-dialog,oscarni/ember-modal-dialog,toranb/ember-modal-dialog,oscarni/ember-modal-dialog,yapplabs/ember-modal-dialog,yapplabs/ember-modal-dialog,samselikoff/ember-modal-dialog,mike-north/ember-modal-dialog,mike-north/ember-modal-dialog,samselikoff/ember-modal-dialog