Update the reference of submodule "plugin".
Merge pull request #5540 from natural-law/master

Update the reference of submodule "plugin".
fix:fix two bug
close #4285:The setFrameEventCallFunc and setMovementEventCallFunc of CCArmature called at the same time in lua script would lead to crash
Merge pull request #5567 from samuele3hu/master_armature

close #4285:The setFrameEventCallFunc and setMovementEventCallFunc of CCArmature called at the same time in lua script would lead to crash
Merge pull request #5559 from samuele3hu/masterFix

fix two bug
Modify the mechanism of  add.*EventListener bound to lua for cocos2d ui
Merge branch 'master' of https://github.com/cocos2d/cocos2d-x into master_armature
Merge pull request #5588 from samuele3hu/master_armature

Modify the mechanism of add.*EventListener bound to lua for cocos2d ui
Merge pull request #3 from cocos2d/master

Master