Merge pull request #30 from 2youyouo2/v2x

update armature
1. modify scrollview addchild
2. modify listview dealloc.
Merge pull request #31 from chengstory/#4600

1. modify scrollview addchild
Merge pull request #32 from 2youyouo2/v2x

update armature
1， merge v2.1.5 to v2x
Merge pull request #33 from chengstory/#4519

1， merge v2.1.5 to v2x
no message
Merge pull request #34 from chengstory/#4620

no message
retain movement event and frame event target