add feature: cc.Sequence.create() and cc.Spawn.create() can pass Array actions.

eg: cc.Sequence.create([cc.Show.create(), cc.Delay.create(1),
cc.Hide.create()]);
Merge pull request #3891 from rablwupei/ccaction_array

fixed #2733: add feature: cc.Sequence.create() and cc.Spawn.create() can pass Array actions