Publish v4.0.4 (aiyaapp#39)

* 1. fixed sdk bug  2. fixed record video demo bug

* 1. update documents

Publish v4.0.0 (aiyaapp#32)

* 1. 代码重构，将各个功能进行了模块化  2. 使用全新的License验证方式  3.加入短视频特效

* 1. 去掉不用的数据

Publish v3.1.1 (aiyaapp#10)

* 1. publish v3.1.1

* 1. Reduce the SDK size

Publish v3.0 (aiyaapp#6)

* 1. 更新版本到v3.0

* 1. 去掉无用的说明

first commit