Updated angular 2 alpha version to .31
Updated angular 2 alpha version to .31

rogerpadilla/angular2-minimalist-starter,marcin-wosinek/angular2-minimalist-starter,ninnemana/node-battle,shootermv/angular2-minimalist-starter,rogerpadilla/angular2-minimalist-starter,xdemocle/angular2-minimalist-starter,xdemocle/angular2-minimalist-starter,marcin-wosinek/angular2-minimalist-starter,jasonaden/taking-notes,shootermv/angular2-minimalist-starter,shootermv/angular2-minimalist-starter,rogerpadilla/angular2-minimalist-starter,jasonaden/taking-notes,jasonaden/taking-notes,xdemocle/angular2-minimalist-starter,marcin-wosinek/angular2-minimalist-starter,ninnemana/node-battle