Upload a mission from a file.

def upload_mission(aFileName):
    """
    Upload a mission from a file. 
    """
    #Read mission from file
    missionlist = readmission(aFileName)
    
    print("\nUpload mission from a file: %s" % aFileName)
    #Clear existing mission from vehicle
    print(' Clear mission')
    cmds = vehicle.commands
    cmds.clear()
    #Add new mission to vehicle
    for command in missionlist:
        cmds.add(command)
    print(' Upload mission')
    vehicle.commands.upload()