Add ability to disable or enable sortable during runtime
Add ability to disable or enable sortable during runtime

MaazAli/ember-cli-sortable,JennieJi/ember-cli-sortable,laantorchaweb/ember-cli-sortable,MaazAli/ember-cli-sortable,jqyu/ember-cli-sortable,Cryrivers/ember-cli-sortable,jqyu/ember-cli-sortable,Cryrivers/ember-cli-sortable,laantorchaweb/ember-cli-sortable,JennieJi/ember-cli-sortable