批处理：simple bash file for video folder batch processing

[Everloom-129]

增加了两个简单的文件方便使用demo_track.py 对videos/ 内的所有视频处理，目前支持mov格式，仅需替换为.mp4等对应格式即可轻松处理多个视频。
./run_tracking.sh 执行批处理的bashfile
./tools/post_rename.py 一个简单的运行后重命名的程序，方便对如JAAD数据集的大批量视频重命名操作
./models/.placeholder 增加一个官方的位置用于提示使用者放置参数

相信这个不影响其他函数的bash file可以有助于大家的科研

Batch processing adds two simple files to facilitate the use of demo_track.py for all video processing within videos/, currently supports mov format, just replace with.mp4 and other corresponding formats to easily process multiple videos.
./run_tracking.sh - Executes the batch bashfile
./tools/post_rename.py - A simple post processing program that facilitates renaming large volumes of videos such as JAAD datasets
./models/.placeholder - adds an official location to prompt users to place models.

I believe that this bash file does not affect other functions can help everyone's scientific research