Second release for submission FX-v2.0
Second release for submission for Udacity testing. Includes the following improvements:
- Prevent driving before traffic light classifier has finished initializing
- Reduce min stopping distance to be able to stop at late-detected lights and improve calculation algorithm
- Retune to stop closer to target stop line waypoint and release brake faster to get through short green light cycles
- Improve traffic light classifier model with additional retraining
- Improve traffic light state validation for yellow-red transitions
- Slight tweaks to DBW parameter tuning for smoother control