chore: update angular2 to 2.0.0-alpha.31
chore: update angular2 to 2.0.0-alpha.31

donniewa/angular2-routing-example,ideadapt/angular2-experiments,ideadapt/angular2-experiments,donniewa/angular2-routing-example,donniewa/angular2-routing-example,ideadapt/angular2-experiments