feat(defer): implement a simple defer like class
feat(defer): implement a simple defer like class

rolandjitsu/ng2-play,rolandjitsu/angular-lab,rolandjitsu/ng2-lab,marc-inn/ng2-play,rolandjitsu/ng2-play,rolandjitsu/ng2-lab,rolandjitsu/angular-lab,marc-inn/ng2-play,btford/ng2-play,marc-inn/ng2-play,rolandjitsu/ng2-lab,marc-inn/ng2-play,rolandjitsu/ng2-play,btford/ng2-play,rolandjitsu/angular-lab,rolandjitsu/ng2-lab,btford/ng2-play,btford/ng2-play,rolandjitsu/angular-lab,rolandjitsu/ng2-play