Update semisub.py

Author: cybergalactic

src/python_vehicle_simulator/vehicles/semisub.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 """
  semisub.py 
@@ -93,7 +94,7 @@ def __init__(
  ) 
  self.nu = np.array([0, 0, 0, 0, 0, 0], float) # velocity vector
  self.u_actual = np.array([0, 0, 0, 0, 0, 0], float) # RPM inputs
- self.name = "Semisubmersible"
+ self.name = "Semisubmersible (see 'semisub.py' for more details)"
 
  self.controls = [
  "#1 Bow tunnel thruster (RPM)",