Custom calibration file path

[youliang]

This issue is relevant to this: #5.

I was trying out the ros driver for yujin lidar but I soon realized that I will need to shift the calib file to a hardcoded path /home/jykim/catkin_ws, along with changing of name.

The hardcoded path is located here. It will be good if the user can also indicate a custom path (e.g.: via export YUJIN_CALIB_PATH="/home/...."). I can also open a pr on this.

[hyeonjeongkim2]

@tanyouliang95
Hello,

we are planning to provide ros parameter setting for ros driver.

we will update you some news about changes later.