improve RailAPI

if you use RailAPI to move the train by turning track switch , you should find the switch.now I improve it and you pass the start edge and end edge,will find automatically find turning track switch and run the shortest path .the detrail see attach first video. and i do something collision preventation,see attach second video.
my company do not allow me to show code,so I only can show the video,if you are interested in it,please contract me.