Implement a custom update callback for the each-* binder. [Closes #183]
Implement a custom update callback for the each-* binder. [Closes #183]

zongkelong/rivets,npmcomponent/mikeric-rivets,MishaMykhalyuk/rivets,moneyadviceservice/rivets,GerHobbelt/rivets,kangax/rivets,jccazeaux/rivets,QAPInt/rivets,re-clone/rivets,altmind/rivets,jccazeaux/rivets,GerHobbelt/rivets,nopnop/rivets,altmind/rivets,jccazeaux/rivets,mikeric/rivets,MishaMykhalyuk/rivets,mikeric/rivets,mikeric/rivets,re-clone/rivets,MishaMykhalyuk/rivets,re-clone/rivets,zongkelong/rivets,GerHobbelt/rivets,zongkelong/rivets,nopnop/rivets,nopnop/rivets,QAPInt/rivets,benderTheCrime/tiny-rivets,QAPInt/rivets,altmind/rivets