Issue #3943: Add the cc.action.repeat() and cc.action.repeatForever()

Add the cc.action.repeat() and cc.action.repeatForever()
Use：
  cc.Sequence.create(cc.Place.create(cc.p(60, 60)), a1).repeat(3);
  cc.Sequence.create( a1.clone(), a1.reverse(), cc.DelayTime.create(0.25)).repeatForever();