[opt]refactor, opt(using preset=2 settings)

[pointcloud]milestone: 绘制成功（不限于第一帧），没有crash

[pointcloud]add point cloud library. Problem: 目前只能画出第一帧的points，MAX_POINTS大于2W很容易crash（目前怀疑是OOM，或者DSO占用内存过大，需要验证）

[draw]milestone: draw camera pose successfully: 10fps using onFrameByPath, 5fps using onFrameByData

[jni]由start改为on frame方式传输数据

[jni]milestone: App calls dsoInit dsoStart successfully and the camera pose updated(publishCamPose is called)

[env]init empty project

Initial commit