prepare 2.8.0
prepare 2.8.0

c1rno/angelhack_frontend_prototype,c1rno/angelhack_frontend_prototype,mseemann/angular2-mdl,mseemann/angular2-mdl,c1rno/angelhack_frontend_prototype,c1rno/angelhack_frontend_prototype,mseemann/angular2-mdl,mseemann/angular2-mdl