import_track
import_track(file_path, imp_opts, width_veh)
Created by: Alexander Heilmeier Modified by: Thomas Herrmann
Documentation: This function includes the algorithm part connected to the import of the track.
Inputs: file_path: file path of track.csv containing [x_m,y_m,w_tr_right_m,w_tr_left_m] imp_opts: import options showing if a new starting point should be set or if the direction should be reversed width_veh: vehicle width required to check against track width
Outputs: reftrack_imp: imported track [x_m, y_m, w_tr_right_m, w_tr_left_m]