* Add VOT models (#4257)
* First version for VOT models.
* Include SiamFC and ATOM.
* A unified architecture for ATOM and Siames series models.
* update vot code (#4338)
* [VOT]Remove local.py generate step, add tracking gif to README (#4344)
* update vot code
* remove local.py generate step, add tracking gif to README
* fix word usage in readme
* add got10k download website
* add pip install paddlepaddle-gpu
* fix word usage