Merge pull request #471 from zhanghongyan/dev

Dev
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge pull request #553 from liaoxuezhi/dev

hi, 已经修改目录结构，queue已经可以单独使用了。
[Feature] 增加plugin接口
Merge pull request #554 from linlingyu/dev

[Feature] 增加plugin接口
Merge pull request #555 from liaoxuezhi/dev

fx功能，待测试用例完善
Merge remote-tracking branch 'upstream/master' into dev
Merge remote-tracking branch 'upstream/dev' into dev
改用plugin接口，对底层dom扩展